Part 1- For the following reaction- select all acid-base theories that.docx

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Part 1: For the following reaction, select all acid-base theories that apply. H2O(l) + :NH3(g) ? NH4+(aq) + OH-(aq) A Arrhenius B BrÃ¸nsted-Lowry C Lewis Part 2: For the following reaction, select all acid-base theories that apply. :NH3(g) + BH3(g) ? NH3â€”BH3(s) A Arrhenius B BrÃ¸nsted-Lowry C Lewis Part 3: For the following reaction, select all acid-base theories that apply. HCl(aq) + H2O(l) ? H3O+(aq) + Cl-(aq) A Arrhenius B BrÃ¸nsted-Lowry C Lewis Part 4: Which of the following substances are amphoteric (can act as either a BrÃ¸nsted-Lowry acid or base)? A HCO3- B H2PO4- C NH4+ D H2O E HS- Solution 1) NH3 is base and H2O is acid NH3 is not donating OH- So, Arrhenius is not valid NH3 is accepting H+ and H2O is donating H+ So, Bronsted-Lowry is valid H2O is not accepting electron pair So, Lewis is not valid Answer: B 2) NH3 is base and H2O is acid NH3 is not donating OH- So, Arrhenius is not valid NH3 is not donating H+ So, Bronsted-Lowry is not valid NH3 is donating electron and BH3 is accepting it So, Lewis is valid Answer: C 3) HCl is acid and H2O is base H2O is not donating OH- So, Arrhenius is not valid H2O is accepting H+ and HCl is donating H+ So, Bronsted-Lowry is valid H2O is not donating electron pair So, Lewis is not valid Answer: B 4) HCO3- can form CO32- or H2CO3 H2PO4- can form HPO42- or H3PO4 NH4+ can form NH3 but canâ€™t accept H+ H2O can form OH- or H3O+ HS- can form H2S or S2- Answer: A,B,D,E .

Education

Solution
1)
NH3 is base and H2O is acid
NH3 is not donating OH-
So, Arrhenius is not valid
NH3 is accepting H+ and H2O is donating H+
So, Bronsted-Lowry is valid
H2O is not accepting electron pair
So, Lewis is not valid
Answer: B
2)
NH3 is base and H2O is acid
NH3 is not donating OH-
So, Arrhenius is not valid
NH3 is not donating H+
So, Bronsted-Lowry is not valid
NH3 is donating electron and BH3 is accepting it
So, Lewis is valid

Answer: C
3)
HCl is acid and H2O is base
H2O is not donating OH-
So, Arrhenius is not valid
H2O is accepting H+ and HCl is donating H+
So, Bronsted-Lowry is valid
H2O is not donating electron pair
So, Lewis is not valid
Answer: B
4)
HCO3- can form CO32- or H2CO3
H2PO4- can form HPO42- or H3PO4
NH4+ can form NH3 but canâ€™t accept H+
H2O can form OH- or H3O+
HS- can form H2S or S2-
Answer: A,B,D,E

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