1. Solutions

2. Identifying set of properties
matter
Pure substances
Identifying set of properties
Elements
Only 1 kind of atom
Compounds
Bonded atoms of 2 or more elements
Mixtures
Properties of 2 or more substances
Homogeneous
Same throughout
Solution
Heterogeneous
Different throughout
colloid
suspension

3. Solutions 2 parts Solute- what is being dissolved
Solvent – what is doing the dissolving

4. volume Solute and solvent particles take up space
Volume of solution must account for both parts

5. Concentration How much solute is dissolved in a solvent
Many different units used
Which one you use depends on what you are doing

6. molarity Most common unit Moles of solute per liter of solution
Symbol: M
We say molar
Molarity= 𝑚𝑜𝑙𝑒𝑠 𝑠𝑜𝑙𝑢𝑡𝑒 𝐿 𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛
Make sure L solution not solvent

7. What is the molarity of 2.30L of a salt water solution that contains 22.5g NaCl?
How many grams of HCl are dissolved in 2350.mL of a 2.12M HCl solution?

8. How many L of a 0.13M CuSO4 solution contain 16.82g CuSO4?

9. molality Mole solute per kg solvent Used in BP and MP calculations
Symbol: m
We say molal
molality = 𝑚𝑜𝑙𝑒𝑠 𝑠𝑜𝑙𝑢𝑡𝑒 𝑘𝑔 𝑠𝑜𝑙𝑣𝑒𝑛𝑡

10. What is the molality of a solution made from 98.3g KCl and 4.2kg H2O?
How many g NaOH are mixed with 1100.mL of H2O to make a 0.10m NaOH solution?

11. How many kg of H2O would you need to add to 125
How many kg of H2O would you need to add to g Ba(OH)2 to make a m Ba(OH)2 solution?