You're in the kitchen making a meal and you happen to get olive oil all over your hands. To get it off, you turn on the faucet and run your hands under the water. After, you notice that your hands are still oily. Why did the oil not dissolve in the water? Draw a picture to help you explain why it is not soluble.

Nickel (II) Nitrate solution is a pretty green color. If you were to add 12.0 grams of solid nickel (II) nitrate to enough water to make 250mL of solution, what would be its concentration?

A student is standardizing a sodium hydroxide solution.  He used 23.22 mL of NaOH to neutralize 1.227 g of KHP (molar mass 204.22 g/mol).  What is the concentration of NaOH in mol/L?

A homogeneous solution contains copper(II) ions (Cu2+), silver ions (Ag*) and potassium ions (K*). You have sodium bromide (NaBr) and sodium sulfide (Na,S) available to use. What should you add and in what order to separate the three metal ions? Ksp (sulfides) 6.0×10 37 Ksp (bromides) Cus CuBr2 soluble Ag2S 6.0x10-51 AgBr 7.7x10-13 K2S soluble KBr soluble Select one: O a. 1. Add NaBr; CuBr2 precipitates out and can be separated. 2. Add Na2S; Ag2S precipitates out and can be separated; leaving K†(aq). O b. 1. Add Na2S; K2S precipitates out and can be separated 2. Add NaBr; CuBr2 precipitates out and can be separated; leaving Ag*(aq). O c. 1. Add Na2S; CuS precipitates out and can be separated. 2. Add NaBr; AgBr precipitates out and can be separated; leaving K*(aq). O d. 1. Add NaBr; AgBr precipitates out and can be separated. 2. Add Na2S; CuS precipitates out and can be separated; leaving K*(aq).