1. Equations Review!

2. For each question your row must:
Write the correct equation
List all variables and the corresponding value given
Plug the variables into the equation
Solve the equation

3. If 5 grams of Mg(OH)2 are dissolved in 350mL, what is the resulting molarity?

4. 2. If a student calculated the pH of a solution to be 4
2. If a student calculated the pH of a solution to be 4.5 and the actual value was 4.7, what is the student’s percent error?

5. 3. 5. 00 L of a gas at a pressure of 3. 5 atm is compressed to 1. 50 L
L of a gas at a pressure of 3.5 atm is compressed to 1.50 L. What is the new pressure of the gas?

6. 4. What volume would 4 moles of oxygen occupy at a temperature of 35ºC and standard pressure?

7. 5. What is the pH of a 0.0001M HCl solution?

8. 6. What amount of heat is released when 150 grams of water is cooled from 98°C to 48°C? The specific heat of water is 4.18J/g*°C

9. 7. What volume of a 10M HCl solution should be diluted to 400mL to obtain a solution with a concentration of 4M?

10. For the last two problems:
Set up the correct t-chart
Solve the problem

11. 8.What is the mass (in grams) of 5 moles of sodium phosphate?”

12. 9. How many grams of aluminum sulfate will be formed if you start with 3 moles of sulfuric acid (H2SO4) and excess Al(NO3)3?
2 Al(NO3)3 + 3 H2SO4  Al2(SO4)3 + 3 HNO3

13. Bonus!!!
The composition of dry is is approximately 78% nitrogen, 21% oxygen, and 1% other gases. What is the partial pressure of nitrogen at standard atmospheric pressure (101.3kPa)?