1. Chapter 12.3 concentration –
a measure of the amount of solute in a given amount of solvent or solution
there are 2 ways to measure concentration
molarity –
the number of moles of solute in one liter of solution
molarity (M) = 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑒 (𝑚𝑜𝑙) 𝑣𝑜𝑙𝑢𝑚𝑒 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (𝐿)

2. Chapter 12.3
ex. What is the molarity of a 3.50 L solution that has 90.0 g of NaCl in it? What mass of glucose (C6H12O6) is needed to make 5.00 x 103 L of M solution?

3. Chapter 12.3
molality –
concentration of a solution expressed in moles of solute per kilograms of solvent
molality (m) = 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑓 𝑠𝑜𝑙𝑢𝑡𝑒 (𝑚𝑜𝑙) 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑠𝑜𝑙𝑣𝑒𝑛𝑡 (𝑘𝑔)

4. Chapter 12.3
ex. Find the molality of a solution made by dissolving 17.1 g of C12H22O11 in 125 g of H2O. What quantity in grams of methanol (CH3OH) is required to prepare a m solution in 400 g of water?

5. Chapter 12.3