Molarity Quiz

What is molarity?

Amount of dissolved substance contained in a given amount of solution

What is the formula for molarity?

M = liters of solution/moles of solute

How do you find the moles for molarity? (Rearranging)

moles = M × volume (L)

Molarity formula rearrange to volume

volume = M/moles​

Solute

The substance that gets dissolved

(eg. Sugar in coffee)

Solution

The substance that dissolves the solute

(eg. The water that dissolves the salt)

What is dilution?

Volume of water that is being added to reduce its concentration.

Formula for dilution

Initial Volume (Vᵢ) x Initial molarity (Mᵢ) = Final Volume (Vf) x Final molarity (Mf) 

What doesn’t change in dilution?

Number of moles doesn’t change

Solutions

Using balanced equations to predict how much volume of the standard solutions will be needed to react. 

What ways you can show work of how many moles in you solution questions?

1. Ratio

2. Equation (to cancel out)

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