Answer to Question #327282 in General Chemistry for Anne

Question

6. How many moles of sucrose 𝐶₁₂𝐻₂₂𝑂₁₁, are contained in 50.0g of a 0.85 m sucrose solution?

7. What volume of 0.25 M NaOH contains 0.050 mol NaOH?

8. What mass of sodium phosphate is dissolved in 255g of a solution that is 20.0% by mass 𝑁𝑎₃𝑃𝑂₄?

9. A 375.0g sample of river water taken near an industrial plant contains 37mg of chromium.

a. What is the mass percent of chromium in the river?

b. How many parts per million of chromium are in the river?

c. How many parts per billion?

10. If a solution of 𝐴𝑔𝑁𝑂₃ is added to an HCl solution, insoluble AgCl will precipitate:

𝐴𝑔𝑁𝑂₃ (𝑎𝑞) + 𝐻𝐶𝑙(𝑎𝑞) → 𝐴𝑔𝐶𝑙(𝑠) + 𝐻𝑁𝑂₃(𝑎𝑞)

What volume of a 1.20 M 𝐴𝑔𝑁𝑂₃ solution must be added to 250.0 mL of a 0.100 M HCl solution to precipitate all the chlorine ion?

Answer 1

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