c) You have 100 ml each of 400 mg/ml sodium phosphate, 250 mg/mlsodium chloride,

Question

c) You have 100 ml each of 400 mg/ml sodium phosphate, 250 mg/mlsodium chloride, and 100 mg/ml potassium nitrate. You want tomake one liter of a solution containing 10 mg/ml sodium phosphate,10 mg/ml sodium chloride, and 10 mg/ml potassium nitrate. Howmuch of each starting solution do you need to use, and how muchwater do you need to add?

d) You have 100 ml each of 50 mg/ml human chorionic gonadotropin,25x HCG buffer, and 400 mM potassium chloride. You want tomake one liter of a solution that is 1 mg/ml human chorionicgonadotropin, 1x HCG buffer, and 40 mM potassiumchloride   How much of each starting solution do you needto use, and how much water do you need to add?

Explanation / Answer

We have 40 g of sodium ph and 60 g of water.

In 1 liter at a concentration of 10 mg/ml i the same as 10g/l.

So we only need 1/4 of the starting solution: 25 ml, and we willadd 975 ml of water.

The same procedure for the other solutions.

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