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To prepare 750 mL of a 15% dextrose solution using D5W and D20W, how much of each is required?

A. 500 mL 20% and 250 mL 5%
B. 600 mL 20% and 150 mL 5%
C. 450 mL 20% and 300 mL 5%
D. 375 mL 20% and 375 mL 5%

Answer :

To prepare 750 mL of a 15% dextrose solution using D 5 W and D20 W 450 mL.20% and 300 mL5% is required.

Option C is correct.

We need to prepare a 750 mL of 15% dextrose solution using D5W and D20W.

The formula used to find the quantity of each solution is given below,concentration of stock solution × volume of stock solution / concentration of resulting solution = volume of resulting solution

For D5W: We need to find out the volume of D5W (5% dextrose in water) required.To apply the above formula, let's plug in the values,

5 × V / 15 = 750

5V = 1125 V

= 225 ml

Therefore, we need 225 ml of D5W.For D20W: We need to find out the volume of D20W (20% dextrose in water) required.

To apply the above formula, let's plug in the values, 20 × V / 15 = 750 20V = 11250 V = 562.5 ml

Therefore, we need 562.5 ml of D20W. Hence, the correct option is (C) 450 mL.20% and 300 mL5%.

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