Task 2: Exam Review for Grade (Write all Scratchwork)

Which is the correct equation for calculating pH?

Hint: It's a pH question.

• pH = log[H⁺]

• pH = -log[H⁺]

• pH = 10^-[H+]

• pH = In[H⁺]

What is the [H⁺] in a solution with a pH of 11?

Hint: It's a pH question.

• 1 x 10^-1 M

• 1 x 10^-2 M

• 1 x 10¹¹ M

• 1 x 10^-11 M

What is the pH if the [H+] is 1.0 x 10-3M?

Hint: It's a pH question.

• 3

• 6

• 9

• 12

What is the pH of a solution with and [H⁺] = 4.5 x 10^-4?

Hint: It's a pH question.

• 3.53

• 3.80

• 3.35

What is the Molarity (M) of 20 moles of NaCl in 5 L of solution?

Hint: It's a Molarity Triangle question.

• 4

• 8

• 12

• 16

What is the Molarity (M) of 100 moles of NaCl in 5 L of solution?

Hint: It's a Molarity Triangle question.

• 60

• 20

• 10

What is the Liters (L) of solution (M) that has 100 moles (n) of NaCl with a Molarity (M) of 5?

Hint: It's a Molarity Triangle question.

• 60

• 20

• 10

• 4

What is the number of moles (n) in a solution that has a Molarity (M) of 4 and is 2L?

Hint: It's a Molarity Triangle question.

• 2

• 4

• 6

• 8

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

Hint: It's a Stoichiometry question, cause it has an equation.

• 1.0 mol

• 6.7 mol

• 4.5 mol

• 10.1 mol

2Na + 2H₂O → 2NaOH+ H₂

How many grams of hydrogen (molar mass = 1g) are produced if 120 g of Na are available?

Hint: It's a Stoichiometry question, cause it has an equation.

• 45 g

• 690 g

• 2.6 g

• 5.3 g