WorksheetsPH Calculations Involving Molarity
Total questions: 20
Worksheet time: 3600secs
If a solution has a [H+] of 9.3x10-11, what is the pH?
10.0
4.0
3.5
8.2
If a solution has a [OH-] of 2.3x10-4, it must be a(n)...
Acid
Base
Neutral
What is the equation for calculating pH?
pH = [H+]
pH = log [H+]
pH = -log[OH-]
pH = -log [H+]
If we dissolve 20.0 grams of HCl in 1.2 L of water, what is the pH of that solution?
0.34
4.21
7.20
10.34
The Kw at room temperature (25 degrees C) is equal to 1.0 x 10-14. It can also be defined as:
the pH and pOH of a solution
the product of the hydronium ion and the hydroxide ion concentrations
-log [hydronium ion]
antilog -pH
If the hydronium ion H3O+ concentration is equal to the hydroxide ion OH- concentration, the solution is a(n)
acid
base
salt
neutral solution
The pH of a solution is 8.43. What is the hydronium ion H3O+ concentration?
3.7 x 10-9 M
2.7 x 10-6 M
1.0 x 10-8.43 M
1.0 x 10-14
The pH of a solution is 8.43. What is the hydroxide ion OH- concentration?
3.7 x 10-9 M
2.7 x 10-6 M
antilog (-pH)
1.0 x 10-14/-pH
How do you enter antilog on your calculator?
push -log
push ln (natural log)
push 10^
push second log
A solution of Ca(OH)2 is 1.0 x 10-5 M. What is the hydronium ion concentration?
1.0 x 10-5 M
1.0 x 10-9 M
5.0 x 10-10 M
2.0 x 10-5 M
What is the hydronium ion concentration of 4.0 M H2SO4?
4.0 M
8.0 M
1.0 x 10-4 M
2.5 x 10-15 M
A solution has 1.0 x 10-8 M hydronium ions. Another solution has 1.0 x 10-3 M hydronium ions. Which solution has a larger number of hydronium ions? Hint this solution is an acid.
1.0 x 10-3 M hydronium ion solution
1.0 x 10-8 M hydronium ion solution
Neither solution is an acid
Kw = [OH- ][H3O+]
Kw = 14
Kw = 1 x 10-14
Kw = 1 x 1014
Kw = 0
What is the [OH-] if the pH is 4.900?
7.94 x 10-10 M
1.00 x 10-4 M
7.94 x 10-14 M
4.90 x 10-10 M
