Reference no: EM132776272
1. How many grams of solid MgCl2 2. If you dissolve 111mg (Formula Weight: 95.211g/mole) are required to prepare 250mL of a 15mM solution? Calcium chloride (Formula Weight: 110.98g/mole) in 50mL of water:
a. What is the concentration of the calcium chloride solution in M and µM?
b. If you take 10mL of this solution and dilute it to 500mL what is the concentration of the calcium chloride in the resulting solution in µM?
c. How many nanomoles of calcium chloride are present in 5mL of the diluted solution?
3. Convert the concentration below to mM and µM:
a. 225mg of glucose (Formula Weight: 180.156g/mole) and water to a final volume of 25mL.
4. What molarity of HCl stock solution is needed so that 0.5mL of this stock solution diluted to 0.015L will yield 50mM?
5 .You have a 5M stock solution of NaCl (Formula Weight: 58.44g/mole), a 0.25M stock solution of glucose (Formula Weight; 180.156g/mole), and a bottle of solid Tris base (Formula Weight: 121.1g/mole). How would prepare (be specific) 250mL of a single solution containing 150mM Tris, 25mM glucose, and 150mM NaCl.
6. Describe how you would prepare 150mL of a 5000µM stock solution of phenol red (Formula Weight: 376.4g/mole). Using this stock solution, describe how you would prepare 25mL of the following dilutions: 0.5mM and 7.5 x 10-4 M
7. How many micrograms of KCl (Formula Weight: 74.55g/mole) are contained in 150mL of 50mM KCl?
8. What is the molar concentration of potassium chloride (Formula Weight: 74.55g/mole) in a 12.5% (w/v) solution?
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: 1. How many grams of solid MgCl2 2. If you dissolve 111mg (Formula Weight: 95.211g/mole) are required to prepare 250mL of a 15mM solution? Calcium chloride (For
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