Pre-AP CHEM Unit 10 Days 5 Review

What is the molarity of a HCl solution if 175mL were used to react with 18.55 grams of Na₂CO₃?
2 HCl + Na₂CO₃ → 2 NaCl + H₂O + CO₂
The molar mass of Na₂CO₃ is 106 g/mol and the molar mass of HCl is 36.5 g/mol.

• 2.00M
• 1.00M
• 0.00100M
• 0.00200M

We add excess sodium chloride solution to 100. mL of a solution of silver nitrate, to form insoluble solid silver chloride. When it has been dried and weighed, the mass of silver chloride is found to be 2.87 grams. What is the molarity of the original silver nitrate solution? The molar mass of silver chloride is 143.32 g/mol.

• 0.200M
• 0.100M
• 0.0500M
• 1.00M

Tags

NGSS.HS-PS1-7

If 23 mL of 0.030 M aqueous HCl is required to neutralize 23 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution.

• 0.030 M
• 0.060 M
• 0.015 M
• 0.12 M

In the reaction below, 180.0 g of water is collected. How many liters of sulfuric acid were used if the concentration is 4.00M?
 H₂SO₄ + Na₂CO₃ → Na₂SO₄ + CO₂ + H₂O

• 2.50L
• 40.0L
• 0.400L
• 5.00L

Tags

NGSS.HS-PS1-5

Consider the precipitation reaction that occurs between sodium phosphate and calcium chloride are mixed to form sodium chloride and calcium phosphate.  If 0.100L of 0.200M sodium phosphate completely reacts, what mass of precipitate forms?

• 3.10g calcium phosphate
• 3.10g sodium chloride
• 3.50g calcium phosphate
• 3.50g sodium chloride

Tags

NGSS.HS-PS1-7