pH of salts calculations
Authored by Benjamin Davey
Science
11th Grade - University
NGSS covered
Used 7+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
HZ is a weak acid. An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 4.93 at 25.0°C. The Ka of HZ is __________.
1.2 x 10-5
6.9 x 10-9
1.4 x 10-10
9.9 x 10-2
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Determine the pH of a 0.35 M aqueous solution of CH3NH2 (methylamine). The Kb of methylamine is 4.4 x 10-4.
10.00
3.86
12.09
1.96
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
An aqueous solution contains 0.050 M of methylamine. The concentration of hydroxide ion in this solution is __________ M. Kb for methylamine is 4.4 x 10-4.
0.050
2.2 x 10-5
2.9 x 10-3
4.5 x 10-3
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The Ka for HCN is 4.9 x 10-10. What is the value of Kb for CN-?
2.0 x 10-5
4.0 x 10-6
4.9 x 10-24
2.0 x 109
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calculate the pH of 0.726 M anilinium hydrochloride (C6H5NH3Cl) solution in water, given that Kb for aniline is 3.83 x 10-4.
1.77
12.64
5.36
8.64
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Kb for NH3 is 1.8 x 10-5. What is the pH of a 0.35 M aqueous solution of NH4Cl at 25.0°C?
9.76
4.35
9.11
4.86
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The Ka for formic acid (HCO2H) is 1.8 x 10-4. What is the pH of a 0.35 M aqueous solution of sodium formate (NaHCO2)?
11.64
5.42
4.26
8.64
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