Chemical Changes

Solutions and conductivity, oxidation and reduction, and the hydrocarbons Alberta industry is built on.

12 questions, free, marked as you go with a worked explanation on every one.

What this covers

• oxidation and reduction together
• moles

The questions

1. 0.75 mol of solute is dissolved to make 3.0 L of solution. What is the concentration?
2. Which solution would conduct electricity best?
3. In a redox reaction, what happens at the same time as reduction?
4. Which best describes a spontaneous redox reaction?
5. Which are properties of simple hydrocarbons? Select all that apply.
6. Why is the hydrocarbon industry economically important in Alberta?
7. A lab technician needs to prepare 500 mL of a salt solution with a concentration of 0.20 mol/L. How many moles of salt must be dissolved to make up that solution?
8. A lab technician takes 250 mL of a 2.0 mol/L cleaning solution and adds water until the total volume is 1.0 L. What is the concentration of the diluted solution?
9. Use the table. Which species is oxidized?
10. How many moles are in 36 g of water?
11. How many moles are in a sample containing 3.01 x 10^23 particles?
12. At STP, what volume does 0.25 mol of an ideal gas occupy?

Answer these free