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- 1. Multiple ChoiceIf a solution has a [H+] of 1.2 x 10-4M what is the [OH-]?8.3 x 10-4M8.3 x 10-11M1.2 x 1010M1.2 x 10-4M
- 2. Multiple ChoiceIf a solution has a [OH-] of 3.42 x 10-12M what is the [H+]?2.92 x 10-3M3.42 x 102M2.92 x 10-2M3.42 x 10-5M
- 3. Multiple Choice
What is the conjugate acid in the following equation?PO43-HNO3NO3-HPO42- - 4. Multiple ChoiceWhat is the conjugate base in the following reaction?HCO3-HClH2CO3Cl-
- 5. Multiple ChoiceWhich accepts protons?Brønsted-Lowry AcidsBrønsted-Lowry BasesArrhenius AcidsArrhenius Bases
- 6. Multiple ChoiceWhich donates protons?Brønsted-Lowry AcidsBrønsted-Lowry BasesArrhenius AcidsArrhenius Bases
- 7. Multiple Choice
Find the pH of a solution with [OH-] = 8.41 x 10-4.
3.08
10.92
9.88
11.23
- 8. Multiple ChoiceCalculate the pH of a 0.47M NH3 (Kb = 1.8 x 10-5) solution.2.548.935.0711.46
- 9. Multiple ChoiceWhich is the weakest acid?HFHNO2CH3COOHHClO
- 10. Multiple Choice
What is the pH of a solution that has an [H+] of 2.5 × 10–5?
4.60
5.0
2.5
7
- 11. Multiple ChoiceWhat is the pOH of a solution that has a pH of 2?1012141
- 12. Multiple Choice
A 1-molar solution of a very weak monoprotic acid has a pH of 5. What is the value of Ka for the acid?
1 × 10–10
1 × 10–7
1 × 10–5
1 × 10–2
- 13. Multiple ChoiceWhich combination will form a buffer solution?100ml of 0.1M HCI with 50ml of 0.1M NaOH100ml of 0.1M CH3COOH with 50ml of 0.1M NaOH50ml of 0.1M HCI with 100ml of 0.1M NaOH50ml of 0.1M CH3COOH with 100ml of 0.1M NaOH
- 14. Multiple Choice
a buffer solution is made of mixture of aqueous methanoic acid, HCOOH, with aqueous sodium methanoate, NaHCOO.
the equilibrium reaction takes place in buffer solution is :
HCOOH ↔ HCOO- + H+
small amount of NaOH is then added to that buffer solution.
What reaction take places at the buffer solution to resist change of pH caused by addition of base?
HCOOH + H+ → HCOOH2
HCOO- + H+ → HCOOH
HCOOH + OH- → HCOO- + H2O
HCOO- + OH- → COO2- + H2O
- 15. Multiple Choice
a buffer solution is made by mixing HA, a weak acid, with salts containing A- ions.
HA ↔ H+ + A-
a formula that can be used for the calculation of the pH of this buffer solution is
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