Strong/Weak_Acid/Base

1,270 views

Published on

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,270
On SlideShare
0
From Embeds
0
Number of Embeds
161
Actions
Shares
0
Downloads
25
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Strong/Weak_Acid/Base

  1. 1. Ch 18 & 19 – Acids and Bases Strong, Weak and Concentrated
  2. 2. Definitions <ul><li>Strong: completely dissociated into ions </li></ul><ul><li>Weak: Only slightly dissociated into ions </li></ul>
  3. 3. Definitions <ul><li>Concentrated: A high number of moles of solute per liter of solution </li></ul><ul><li>Dilute: A low number of moles of solute per liter of solution </li></ul><ul><li>* An acid/base can be strong and dilute or weak and concentrated, etc… </li></ul>
  4. 4. Strong & Weak Acids/Bases <ul><li>Strong Acids: HCl, HNO 3 , H 2 SO 4 , HBr, HI, HClO 4 </li></ul><ul><li>Weak Acids: all others </li></ul><ul><li>(ex:HF, CH 3 COOH, H 3 PO 4 , H 2 CO 3 , HCN) </li></ul><ul><li>Strong Bases: Group 1 Hydroxides (ex; NaOH) and lower group 2 hydroxides (ex: Ba(OH) 2 ) </li></ul><ul><li>Weak Bases: all others (ex: NH 3 ) </li></ul>
  5. 5. Distinguishing between Strong and Weak Acids/Bases <ul><li>pH measurement of two substances of same molarity (strong acids/bases dissociate more and have more extreme pH) </li></ul><ul><li>Conductivity measurement of two substances of same molarity (strong acids/bases have higher conductivity) </li></ul><ul><li>Rate of reaction: strong acids/bases will react more vigorously and produce more products </li></ul>
  6. 6. Acidic and Basic Salts <ul><li>Salts dissociate in water </li></ul><ul><li>Some of these ions are weak acids or bases </li></ul><ul><li>To predict if acidic or basic salt must look at the acid and base that forms the salt </li></ul>
  7. 7. Neutral Salt <ul><li>Formed from a strong acid and strong base </li></ul><ul><li>NaOH + HCl -> NaCl + H 2 O </li></ul><ul><li>strong strong neutral </li></ul><ul><li>base acid </li></ul>
  8. 8. Acidic Salt <ul><li>Formed from strong acid and weak base </li></ul><ul><li>NH 3 + HCl -> NH 4 Cl </li></ul><ul><li>weak strong acidic </li></ul><ul><li>base acid </li></ul><ul><li>Salt dissociates to form hydronium ions </li></ul><ul><li>NH 4 Cl -> NH 4 + + Cl - </li></ul><ul><li>NH 4 + + H 2 O -> H 3 O + + NH 3 </li></ul>
  9. 9. Basic Salts <ul><li>Formed from strong base and weak acid </li></ul><ul><li>H 2 CO 3 + NaOH -> Na 2 CO 3 </li></ul><ul><li>weak strong basic </li></ul><ul><li>acid base </li></ul><ul><li>Salt dissociates to form hydroxide ions </li></ul><ul><li>Na 2 CO 3 -> Na + + CO 3 2- </li></ul><ul><li>CO 3 2- + H 2 O -> OH - + HCO 3 - </li></ul>

×