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12 Dec 2019

A. Calculate the molarity of 1.5 moles of glucose in 4.5 L of glucose solution B.Calculate the molarity of 3.5 g of KOH in 2.5 L of KOH solution C. 6.35 g of NaCl in 400. mL of NaCl solution

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Related questions

Calculate the molarity of each of the following.

A) 3.50 g of KOH in 3.50 L of a KOH solution

B) 6.15 g of NaCl in 200. mL of a NaCl solution

1. Conversions:

A.) How many grams of potassium acetate (MW=98.15 g/mol) are needed to prepare 0.5 L of a 3 M solution?

B.) You have 70 ml of an 60% stock of glucose (180.16g/mol), and you want to prepare 15 ml of a 10% (v/v) glucose solution. How much of your stock and how much water should be used?

C.) You add 20 ml of a 2 M stock solution of NaCl (MW=58.44 g/mol) to 80 ml water. What is the molarity of the final NaCl concentration?

1) Chalkleys Amoeba Media- Calculate molarity

Nacl 0.1 g/l

KCl 0.004 g/l

CaCl2 0.006 g/l

2) A student is given 400 ml of a 3 M solution of NaCl and told to make 1,000 nl of a 0.5 M NaCl solution. How much H2O miust be added to how many ml of the original solution to arrive at exactly 1,000 ml of 0.5 M NaCl?

3) A 475 ml flask of 2 M NaCl is inadvertently left out on a hot plate over night by a careless student. When the flask is finally removed, its volume is only 125 ml. What is the molarity of the solution left in the flask?

4) 200 ml of a 0.5 M CaCl2 solution, 450 ml of a 3M CaCl2 solution and 750 ml of a 2 M CaCl solution are blended in a flask. To this 600 ml of H2 are added. What is the molarity of the final solution?

5) How many grams of K2HPO4 are required to make 350 ml of 0.5 M K2HPO4?

6) What is the molarity of a solution formed by adding 50 ml of 0.2 M NaCl to 100 ml of 0.1 M NaCl?

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