Question

4 June 2019 CHEM 177-Su19 Chapter 4 APP-1 4. Hydrochloric acid (HCI) is generally sold as an 11.65 M solution. When doing titration experiments, many will use an HCl concentration of 1.00 M HCl. If you wanted to make 150 mL of 1.00 M HCI, how many mL of the stock HCl solution would you need? 5. A 4.00 L stock solution of H3PO4 of unknown concentration was mixed with 4.00 L of pure water. The concentration of the new mixture was found to be 0.275 M H3PO4. What was the concentration of the original 4.00 L stock solution? 6. An experiment that is done in Chem 178L requires you to create 500 mL of 1.00 uM Fe solution. However, you are limited to only being able to mass out 10. mg of FeSO accurately and can only use 500 mL flasks. a. What is the Fe2 molarity of the solution as you add 10. mg of FeSO4 to make a 500 mL solution? b. Using the Fe stock solution you just created, how much of it would you need to make 500 mL of 1.00 uM Fe2 solution?

Answer 1

4. M/V, 150 Y1.0 0 2 .89M MIVI MIY402 0.SSM MI- I0 X10 Mole - IS2 D D0013 M XaseS MShe o.500 X 1x16 5x10 7. 60X10 SX16 X1Sニ man ニ