{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

24-acids_bases

# 24-acids_bases - Percent Dissociation HA(aq H2O(l H3 O(aq...

This preview shows pages 1–4. Sign up to view the full content.

1 Week 10 CHEM 1310 - Sections L and M 1 Percent Dissociation HA(aq) + H 2 O(l) H 3 O + (aq) + A - (aq) % Dissociation = [A - ] [HA] x 100 Week 10 CHEM 1310 - Sections L and M 2 Polyprotic Acids + 1- 2 3 3 1- + 2- 3 3 H CO H (aq) + HCO (aq) HCO (aq) H (aq) + CO (aq) ´ ´ + - -7 3 a1 2 3 [H ][HCO ] K = = 4.3x10 [H CO ] + 2- -11 3 a2 - 3 [H ][CO ] K = = 4.8x10 [HCO ] Calculate the fractions of H 2 CO 3 , HCO 3 , and CO 3 2– at pH 10.00 Solve on board…

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 Week 10 CHEM 1310 - Sections L and M 3 Example Problem + - -7 3 a1 2 3 [H ][HCO ] K = = 4.3x10 [H CO ] fi - -7 3 3 a1 + -10 2 3 [HCO ] K 4.3x10 = 4.3x10 [H CO ] [H ] 1.0x10 = = + 2- -11 3 a2 - 3 [H ][CO ] K = = 4.8x10 [HCO ] fi 2- -11 3 a2 - + -10 3 [CO ] K 4.8x10 = 0.48 [HCO ] [H ] 1.0x10 = = -4 2 3 - 3 3 [H CO ] 1 = 2.3x10 [HCO ] 4.3x10 = Calculate the fractions of H 2 CO 3 , HCO 3 , and CO 3 2– at pH 10.00 Week 10 CHEM 1310 - Sections L and M 4 Fraction of H 2 CO 3 2- -11 3 a2 - + -10 3 [CO ] K 4.8x10 = 0.48 [HCO ] [H ] 1.0x10 = = -4 2 3 - 3 3 [H CO ] 1 = 2.3x10 [HCO ] 4.3x10 = 2 3 2 3 2 2 3 3 3 2 3 3 2 3 2 2 3 3 3 3 3 3 -4 -4 2 3 -4 [ ] ( ) [ ] [ ] [ ] [ ] [ ] ( ) [ ] [ ] [ ] [ ] [ ] [ ] 2.3 x 10 ( )= 1.6x10 2.3 x 10 + 1 + 0.48 H CO f H CO H CO HCO CO H CO HCO f H CO H CO HCO CO HCO HCO HCO f H CO - - - - - - - - = + + = + + =
3 Week 10 CHEM 1310 - Sections L and M 5 Fraction of HCO 3 - 2- -11 3 a2 - + -10 3 [CO ] K 4.8x10 = 0.48 [HCO ] [H ] 1.0x10 = = -4 2 3 - 3 3 [H CO ] 1 = 2.3x10 [HCO ] 4.3x10 = 3 3 2 2 3 3 3 3 3 3 2 2 3 3 3 3 3 3 3 -4 [ ] ( ) [ ] [ ] [ ] [ ] [ ] ( ) [ ] [ ] [ ] [ ] [ ] [ ] 1 ( )= 0.68 2.3 x 10 + 1 + 0.48 HCO f HCO H CO HCO CO HCO HCO f HCO

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

24-acids_bases - Percent Dissociation HA(aq H2O(l H3 O(aq...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online