Solution Stoichiometry

Front

What is solution stoichiometry?

Back

Solution stoichiometry is the calculation of reactants and products in chemical reactions in solution, using molarity and volume to determine the amounts of substances involved.

Front

Define molarity (M).

Back

Molarity (M) is a measure of concentration, defined as the number of moles of solute per liter of solution.

Front

How do you calculate moles from molarity and volume?

Back

Moles = Molarity (M) × Volume (L).

Front

What is the balanced equation for the neutralization of HCl with KOH?

Back

HCl + KOH → H2O + KCl.

Front

If 0.75 M KOH is used, how do you find the moles of KOH in 85 mL?

Back

Moles of KOH = 0.75 M × 0.085 L = 0.06375 mol.

Front

How many moles of HNO3 are needed to neutralize KOH in a 1:1 ratio?

Back

The moles of HNO3 needed are equal to the moles of KOH.

Front

What is the relationship between moles and grams?

Back

Grams = Moles × Molar Mass.

Front

How do you convert mL to L?

Back

To convert mL to L, divide the volume in mL by 1000.

Front

What is the molarity of an acid if 25.0 mL of 0.5 M KOH neutralizes 15.0 mL of it?

Back

Molarity of acid = (Molarity of KOH × Volume of KOH) / Volume of acid = (0.5 M × 0.025 L) / 0.015 L = 0.833 M.

Front

How do you calculate the mass of Mg(OH)2 needed for a reaction with HCl?

Back

Use the balanced equation to find moles of Mg(OH)2 needed, then convert moles to grams using its molar mass.