Solution Stoichiometry

Question 1

Stoichiometry

Answer 1

• To predict how much of one reactant is needed to completely react with another
• To predict how much of a product is formed from the given quantity of the reactants
• To predict how much reactant is needed to form desired amount of a product

Question 2

Solution Stoichiometry

Answer 2

• We start and end our calculations with volumes and concentrations, not mass
• This is because our chemical reactions happen in aqueous solutions

Question 3

Unit 4 Flowchart

Answer 3

• Step 1 changes to convert given concentration and volume to moles (n=cv)
• Step 4 changes to convert moles to concentration or volume (c= n/V or V= n/c)
• Steps 2 and 3 stay the same

Question 4

Stoichiometry of ions in solution

Answer 4

• We may need find the concentration of a ion rather than the concentration of the compound
• The ions concentration is found by the dissociation equation
• CaCl –> Ca + 2Cl
• The mole ratio between Ca and Cl is 1:2, meaning there is twice as many ions that calcium ions
• If Ca has 3 mol/L, Cl would have 6 mol/L