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Molarity

Q. Given the following information: • Concentrated perchloric acid (HClO4) stock = 70% (w/w). • % weight/weight (w/w) will mean number of ‘mass’ parts in 100 ‘mass’ parts. • Density of concentrated perchloric acid (70% (w/w)) stock = 1.664 g/mL. • Molecular mass: HClO4 = 100.46 g/mol. b) What volume of concentrated perchloric acid (HClO4) stock is required to make 200 mL of a pH 2.5 perchloric acid solution?

Solved • Aug 9, 2019

Molarity

Q. You need to prepare 200 mL of a 0.4 M solution of copper sulfate (CuSO4). You have 80 mL of a 0.5 M CuSO4 solution and 100 mL of a 7.5% (w/v) CuSO4 solution. What volume of 7.5% CuSO4 and water needs to be added to the 80 mL of 0.5 M CuSO4 solution to make up 200 mL of 0.4 M CuSO4? • Molar mass of CuSO4 = 159.609 g/mol. • % (weight / volume) means mass (in g) in volume (100 mL).

Solved • Aug 8, 2019

Molarity

Q. How would you prepare a 345ml of .12 M Fe(NO3)3 using the solid Fe(NO3)3 reagent?

Solved • Jul 29, 2019

Molarity

Q. 46g of acetic acid are dissolved in 54g of water the solution has density of 1.12g/mol . what is the concetration

Solved • Jul 25, 2019

Molarity

Q. A solution is 0.0433m LiF. What is the molarity of the solution if the density is 1.10 g/mL? A) 0.0390 M B) 0.0417 M C) 0.0441 M D) 0.0519 M E) 0.0476 M

Solved • Jul 15, 2019

Molarity

Q. Aqueous solutions of 30% (by weight) hydrogen peroxide, H2O2, are used to oxidize metals or organic molecules in chemical reactions. Given that the density of the solution is 1.11 g/mL, calculate the molarity. A) 6.78 M B) 9.79 M C) 12.6 M D) 0.794 M

Solved • Jul 15, 2019

Molarity

Q. Write a detailed set of directions for preparing 500.00mL of 0.1000 M potassium dichromate, K2Cr2O7. Draw a diagram.

Solved • Jul 12, 2019