Solutions Trashketball

Vocabulary

100

What is a solute?

The solid dissolved in the liquid

200

What is the solvent?

The liquid the solid is dissolved in

300

What is a polar molecule?

Covalent molecule with different atoms attached - like C-O 

Bonus point for saying difference in charge

400

What is an ionic compound?

A positive cation and a negative anion together - balancing charge

500

What is an electrolyte?

What is a nonelectrolyte?

Electrolyte is a dissolved charged ion in water

Nonelectrolyte is something that won't dissolve into ions - no charge

Solubility

100

What is solubility?

The amount of solute that can dissolve in a given amount of water

200

True or false: heating increases the solubility of all solids

True

300

Name two ways you can increase the rate of solubility of any substance

You can stir it, you can crush the material, you an also heat up the solution

400

An example of a solute that increases in solubility as the temperature increases?

Sugar, salt, etc

500

An example of a solute that decreases in solubility as the temperature increases?

Any gas - CO2, etc.

Calculating Moles

100

What is the molar mass of CaCO3?

100 g/mol

200

How many moles in 32 grams of water?

2 moles!

300

What is the mass in grams of 0.25 moles of NaCl?

Around 14.6 g

400

How many atoms of hydrogen in 10 moles of CH₄?

2.408 * 10²⁵ atoms

500

A sample contains 3.01 * 10²³ molecules of CO₂. How many grams is that?

22 grams

Calculations around Molarity

100

When calculating the concentration of a solution, what measurement goes on the bottom of the formula?

Liters

200

I put 7.9 moles of solute into 2 Liters of water. What is my molarity?

3.95 mol/L

300

How many moles of Calcium Carbonate (CaCO₃) are needed to make 0.500 L of a 8.5M solution?

4.25 moles!

400

You have 15 mL of a 4.0M solution. What volume of water will you need to add to decrease the molarity to 1.0M?

Total volume = V2 = 60 mL

But

Water added = 60 mL - 15 mL = 45 mL!

500

How many grams of potassium carbonate (KCO₃ = 138.3 g/mol) would you need to make 2 L of a 4.5 M solution?

1244.7 grams!

2 L * 4.5 mol/L = 9 moles * 138.3 g/mol = 1244.7 g

Predicting Precipitate

100

Would NaNO3 precipitate?

No it would stay dissolved!

200

Would NH₄OH precipitate?

No it would not! OH normally does make PPT but since it has NH₄ with it, it will dissolve!

300

Would AgCl precipitate?

Yes it would! Cl^- makes a precipitate with Ag⁺

400

I mix NaNO₃ (aq) solution with MgCO₃ (aq) solution. Will a precipitate form? Bonus point if you can show all possible compounds formed in the mixture

Possible compounds - Na₂CO₃ and Mg(NO₃)₂. 

No precipitate would form!

500

I mix Ca₃(PO₄)₂ (aq) solution with BeSO₄ (aq) solution. Will a precipitate form? Bonus point if you can show all possible compounds formed in the mixture

Yes, two precipitates will form!

CaSO₄ is precipitate

Be₃(PO₄)₂ would also precipitate!

Be²⁺ and PO₄^3- make Be₃(PO₄)₂