Solutions Trashketball

Vocabulary

300

What is a solute?

The solid dissolved in the liquid

600

What is the solvent?

The liquid the solid is dissolved in

900

What is a polar molecule?

Covalent molecule with different atoms attached - like C-O 

Bonus point for saying difference in charge

1200

What is an ionic compound?

A positive cation and a negative anion together - balancing charge

1500

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

300

What is solubility?

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

600

True or false: heating increases the solubility of all solids

True

900

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

1200

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

Sugar, salt, etc

1500

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

Any gas - CO2, etc.

Calculating Moles

300

What is the molar mass of CaCO3?

100 g/mol

600

How many moles in 32 grams of water?

2 moles!

900

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

Around 14.6 g

1200

How many atoms of hydrogen in 10 moles of CH₄?

2.408 * 10²⁵ atoms

1500

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

22 grams

Calculations around Molarity

300

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

Liters

600

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

3.95 mol/L

900

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

4.25 moles!

1200

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!

1500

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

300

Would NaNO3 precipitate?

No it would stay dissolved!

600

Would NH₄OH precipitate?

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

900

Would AgCl precipitate?

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

1200

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!

1500

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