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Mata Pelajaran : Kimia
Kelas/ semester : XII.IPA/1
Topik : SifatKoligatif Larutan
(Tekanan UapLarutan )
Indikator :
1. Membedakan sifat koligatif tekanan uap larutan nonelektrolit dan larutan elektrolit berdasarkan data data
percobaan.
2. Menghitung tekanan uap larutan nonelektrolitdan elektrolit
3. Menghitung penurunan tekanan uap larutan nonelektrolitdan elektrolit
Tujuan :
1. Peserta didik dapat membedakan sifat koligatif tekanan uap larutan nonelektrolit dan larutan elektrolit yang
konsentrasinya sama berdasarkan data percobaan.
2. Peserta didik dapatmenganalisis sifatkoligatif larutan nonelektrolitdan elektrolit yang konsentrasinya sama
melalui data percobaan
3. Peserta didik dapatmenghitung tekanan uap dan penurunan tekanan uap larutan nonelektrolitdan larutan
elektrolit
A. Fenomena
No Larutan Xt Po P ∆P
1 Sukrosa 0,01 25 mmHg 24,75 mmHg 0,25
2 Sukrosa 0,03 25 mmHg 24,25 mmHg 0,75
3 Etanol 0,01 25 mmHg 24,75 mmHg 0,25
4 Etanol 0,03 25 mmHg 24,25mmHg 0,75
5 NaCl 0,01 25 mmHg 20,46 mmHg 4,54
6 NaCl 0,03 25 mmHg 13,50 mmHg 11,50
7 Ba(OH)2 0,01 25 mmHg 18,75 mmHg 6,25
8 Ba(OH)2 0,03 25 mmHg 10,94 mmHg 14,06
B. RumusanMasalah
Berdasarkan fenomena diatas, rumuskan permasalahan apa yang kalian temukan!
LEMBAR KEGIATAN PESERTA DIDIK
TEKANAN UAP LARUTAN
(elektrolit dan non elektrolit)
...................................................................................................................
...................................................................................................................
...................................................................................................................
...................................................................................................................
Amatilah Tabel
dibawah ini !
C. Hipotesis
Coba perkirakan jawaban sementara dari masalah yang telah kalian rumuskan!
D. Mengumpulkandata
E. AnalisisData
I.Membedakansifatkoligatiflarutanelektrolitdannonelektrolit
Data Percobaan :
No Larutan Xt Po P ∆P
........................................................................................................................
........................................................................................................................
........................................................................................................................
.......................................................................................................................
Cari beberapa sumber untuk
menjawab rumusan masalah
diatas!
1 Sukrosa 0,01 25 mmHg 24,75 mmHg 0,25
2 Sukrosa 0,03 25 mmHg 24,25 mmHg 0,75
3 Etanol 0,01 25 mmHg 24,75 mmHg 0,25
4 Etanol 0,03 25 mmHg 24,25mmHg 0,75
5 NaCl 0,01 25 mmHg 20,46 mmHg 4,54
6 NaCl 0,03 25 mmHg 13,50 mmHg 11,50
7 Ba(OH)2 0,01 25 mmHg 18,75 mmHg 6,25
8 Ba(OH)2 0,03 25 mmHg 10,94 mmHg 14,06
Kelompokkanyangmanatermasuklarutanelektrolitdannonelektrolitsesuai
dengantabel diatas?
Pada larutanNo.1 dan 2 apakah zat terlarutnyasama?Bagaimanadengan
penurunantekananuapnyasamaatau berbeda?
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Pertanyaan
1
2
3
4
Padalarutan 1 dan3 bagaimanakahpenurunantekanan uapnyasamaatauberbeda?
Darihal diatasapa yang dapat kamusimpulkan ?
Sukrosa 0,01 dan NaCl 0,01 dengan pelarut murni yang sama menghasilkan tekanan uap
yang berbeda?Mengapademikian?
Dari hal di atas jelaskan perbedaan sifat koligatif larutan nonelektrolit dan larutan elektrolit
yang menggunakankonsentrasisama?
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.
5
6
7
8
Pada larutan5 dan7 apakah zat terlarutnyasama?Bagaimanadenganpenurunan
tekananuapnyaapakahsama atau berbeda?
Mengapa larutan pada No.5 di atas berbeda penurunan tekanan uapnya padahal zat
terlarutnya sama?Apakah yang mempengaruhihaltersebut?
9 Bagaimanacara menghitungpenurunantekananuaplarutannonelektrolitdan
larutanelektrolit,tuliskanrumuslengkapsesuai dengantabel datapercobaandi
II. MenghitungnilaiTekananuapdanPenurunantekananuap
Selesaikan soal dibawah ini !!!
1. Sebanyak 9 gram glukosa dilarutkan dalam air sebanyak 900 gram jika diketahui
tekanan uap jenuh pelarut murni pada suhu 25◦C adalah 31 mmHg. Tentukan
penurunan tekanan uap larutan tersebut !
Step1 : Tuliskanapayang diketahui danditanyakanpadasoal diatas!
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Step2 : Hitunglahjumlahmol masing-masingzattersebut!
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Step3 : Hitunglahfraksi mol glukosadanpelarutairberdasarkansoal diatas!
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.
2. Sebanyak 2 gram MgCl2 dilarutkan dalam air 160 pada suhu 27 tekanan uap air murni
pada suhu tersebut 30 mmHg. Mr = 95 tentukan tekanan uap larutan dan penurunan
tekanan uap larutan tersebut?
Step4 : Hitunglahnilai penurunantekananuaplarutandenganmenggunakanrumus
yang telahkalianpelajari !
..........................................................................................................................
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...........................................................................................................................
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........
Step1 : Tuliskanapayang diketahui danditanyakanpadasoal diatas!
...........................................................................................................................
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..
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Step2 : Hitunglahjumlahmol masing-masingzattersebut!
............................................................................................................................
............................................................................................................................
Step3 : Tuliskanreaksi ionisasi dari MgCl2 ,lalutentukanion-ionyangterbentuk?
.............................................................................................................................
.............................................................................................................................
.............................................................................................................................
.............................................................................................................................
Step4 : Berdasarkansoal no.3 diatas,Adaberapanilai i yang kamuperoleh
berdasarkanfaktorvan’thoff?
.............................................................................................................................
.............................................................................................................................
.............................................................................................................................
Step5 : Hitunglahnilai fraksi mol dari airdanMgCl2 denganmenggunakanrumus
fraksi mol untukzat elektrolityangtelahkamupelajari?
............................................................................................................................
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.............................................
Step6 : Hitunglahnilai tekananuapdanpenurunantekananuaplarutandengan
menggunakanrumusyangtelahkamu pelajari !
............................................................................................................................
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..
H. MengujiHipotesis
G. MerumuskanKesimpulan
( Kepandaian yang ragu akan dikalahkan oleh kebodohan yang yakin )
Apakah hasil yang diperoleh sesuai dengan hipotesis yang kamu
buat, jelaskan! Apabila tidak sesuai, apa perbedaan hipotesis
dengan hasil yang diperoleh Mengapa berbeda? Jelaskan?
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Apa yang bisa kamu simpulkan tentang sifat koligatif larutan tekanan uap
larutan nonelektrolit dan nonelektrolit? Tuliskan kesimpulanmu dibawah ini!
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Lkpd tekanan uap

  • 1. Mata Pelajaran : Kimia Kelas/ semester : XII.IPA/1 Topik : SifatKoligatif Larutan (Tekanan UapLarutan ) Indikator : 1. Membedakan sifat koligatif tekanan uap larutan nonelektrolit dan larutan elektrolit berdasarkan data data percobaan. 2. Menghitung tekanan uap larutan nonelektrolitdan elektrolit 3. Menghitung penurunan tekanan uap larutan nonelektrolitdan elektrolit Tujuan : 1. Peserta didik dapat membedakan sifat koligatif tekanan uap larutan nonelektrolit dan larutan elektrolit yang konsentrasinya sama berdasarkan data percobaan. 2. Peserta didik dapatmenganalisis sifatkoligatif larutan nonelektrolitdan elektrolit yang konsentrasinya sama melalui data percobaan 3. Peserta didik dapatmenghitung tekanan uap dan penurunan tekanan uap larutan nonelektrolitdan larutan elektrolit A. Fenomena No Larutan Xt Po P ∆P 1 Sukrosa 0,01 25 mmHg 24,75 mmHg 0,25 2 Sukrosa 0,03 25 mmHg 24,25 mmHg 0,75 3 Etanol 0,01 25 mmHg 24,75 mmHg 0,25 4 Etanol 0,03 25 mmHg 24,25mmHg 0,75 5 NaCl 0,01 25 mmHg 20,46 mmHg 4,54 6 NaCl 0,03 25 mmHg 13,50 mmHg 11,50 7 Ba(OH)2 0,01 25 mmHg 18,75 mmHg 6,25 8 Ba(OH)2 0,03 25 mmHg 10,94 mmHg 14,06 B. RumusanMasalah Berdasarkan fenomena diatas, rumuskan permasalahan apa yang kalian temukan! LEMBAR KEGIATAN PESERTA DIDIK TEKANAN UAP LARUTAN (elektrolit dan non elektrolit) ................................................................................................................... ................................................................................................................... ................................................................................................................... ................................................................................................................... Amatilah Tabel dibawah ini !
  • 2. C. Hipotesis Coba perkirakan jawaban sementara dari masalah yang telah kalian rumuskan! D. Mengumpulkandata E. AnalisisData I.Membedakansifatkoligatiflarutanelektrolitdannonelektrolit Data Percobaan : No Larutan Xt Po P ∆P ........................................................................................................................ ........................................................................................................................ ........................................................................................................................ ....................................................................................................................... Cari beberapa sumber untuk menjawab rumusan masalah diatas!
  • 3. 1 Sukrosa 0,01 25 mmHg 24,75 mmHg 0,25 2 Sukrosa 0,03 25 mmHg 24,25 mmHg 0,75 3 Etanol 0,01 25 mmHg 24,75 mmHg 0,25 4 Etanol 0,03 25 mmHg 24,25mmHg 0,75 5 NaCl 0,01 25 mmHg 20,46 mmHg 4,54 6 NaCl 0,03 25 mmHg 13,50 mmHg 11,50 7 Ba(OH)2 0,01 25 mmHg 18,75 mmHg 6,25 8 Ba(OH)2 0,03 25 mmHg 10,94 mmHg 14,06 Kelompokkanyangmanatermasuklarutanelektrolitdannonelektrolitsesuai dengantabel diatas? Pada larutanNo.1 dan 2 apakah zat terlarutnyasama?Bagaimanadengan penurunantekananuapnyasamaatau berbeda? ..................................................................................................................................... ..................................................................................................................................... ..................................................................................................................................... .................................................. ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ . ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ . ........................................................................................................ ........................................................................................................ ........................................................................................................ ........................................................................................................ ................................. Pertanyaan 1 2 3 4 Padalarutan 1 dan3 bagaimanakahpenurunantekanan uapnyasamaatauberbeda? Darihal diatasapa yang dapat kamusimpulkan ?
  • 4. Sukrosa 0,01 dan NaCl 0,01 dengan pelarut murni yang sama menghasilkan tekanan uap yang berbeda?Mengapademikian? Dari hal di atas jelaskan perbedaan sifat koligatif larutan nonelektrolit dan larutan elektrolit yang menggunakankonsentrasisama? ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ . .............................................................................................................. .............................................................................................................. .............................................................................................................. .............................................................................................................. ......... ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ . ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ . 5 6 7 8 Pada larutan5 dan7 apakah zat terlarutnyasama?Bagaimanadenganpenurunan tekananuapnyaapakahsama atau berbeda? Mengapa larutan pada No.5 di atas berbeda penurunan tekanan uapnya padahal zat terlarutnya sama?Apakah yang mempengaruhihaltersebut? 9 Bagaimanacara menghitungpenurunantekananuaplarutannonelektrolitdan larutanelektrolit,tuliskanrumuslengkapsesuai dengantabel datapercobaandi
  • 5. II. MenghitungnilaiTekananuapdanPenurunantekananuap Selesaikan soal dibawah ini !!! 1. Sebanyak 9 gram glukosa dilarutkan dalam air sebanyak 900 gram jika diketahui tekanan uap jenuh pelarut murni pada suhu 25◦C adalah 31 mmHg. Tentukan penurunan tekanan uap larutan tersebut ! Step1 : Tuliskanapayang diketahui danditanyakanpadasoal diatas! ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .......... Step2 : Hitunglahjumlahmol masing-masingzattersebut! ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... .......................................................................................................................... Step3 : Hitunglahfraksi mol glukosadanpelarutairberdasarkansoal diatas! ........................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ ................................................................................................................ .
  • 6. 2. Sebanyak 2 gram MgCl2 dilarutkan dalam air 160 pada suhu 27 tekanan uap air murni pada suhu tersebut 30 mmHg. Mr = 95 tentukan tekanan uap larutan dan penurunan tekanan uap larutan tersebut? Step4 : Hitunglahnilai penurunantekananuaplarutandenganmenggunakanrumus yang telahkalianpelajari ! .......................................................................................................................... ......................................................................................................................... ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... ........ Step1 : Tuliskanapayang diketahui danditanyakanpadasoal diatas! ........................................................................................................................... ........................................................................................................................... ........................................................................................................................... .. ........................................................................................................................... .......................... Step2 : Hitunglahjumlahmol masing-masingzattersebut! ............................................................................................................................ ............................................................................................................................
  • 7. Step3 : Tuliskanreaksi ionisasi dari MgCl2 ,lalutentukanion-ionyangterbentuk? ............................................................................................................................. ............................................................................................................................. ............................................................................................................................. ............................................................................................................................. Step4 : Berdasarkansoal no.3 diatas,Adaberapanilai i yang kamuperoleh berdasarkanfaktorvan’thoff? ............................................................................................................................. ............................................................................................................................. ............................................................................................................................. Step5 : Hitunglahnilai fraksi mol dari airdanMgCl2 denganmenggunakanrumus fraksi mol untukzat elektrolityangtelahkamupelajari? ............................................................................................................................ ............................................................................................................................ ............................................. Step6 : Hitunglahnilai tekananuapdanpenurunantekananuaplarutandengan menggunakanrumusyangtelahkamu pelajari ! ............................................................................................................................ ............................................................................................................................ ............................................................................................................................ ..
  • 8. H. MengujiHipotesis G. MerumuskanKesimpulan ( Kepandaian yang ragu akan dikalahkan oleh kebodohan yang yakin ) Apakah hasil yang diperoleh sesuai dengan hipotesis yang kamu buat, jelaskan! Apabila tidak sesuai, apa perbedaan hipotesis dengan hasil yang diperoleh Mengapa berbeda? Jelaskan? ........................................................................................................... ........................................................................................................... ........................................................................................................... ........................................................................................................... ........................................................................................................... ........................................................................................................... .................................................................................................... Apa yang bisa kamu simpulkan tentang sifat koligatif larutan tekanan uap larutan nonelektrolit dan nonelektrolit? Tuliskan kesimpulanmu dibawah ini! ....................................................................................................................... ....................................................................................................................... ....................................................................................................................... ....................................................................................................................... ....................................................................................................................... ....................................................................................................................... ....................................................................................................................... ..........................................................