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A solution is prepared using 0.125 g of glucose, , in enough water to make 250. G of total solution. The concentration of this solution, expressed in parts per million, is A) 5.00 x 101 ppm B) 5.00 x 102 ppm C) 5.00 x 103 ppm D) 5.00 x 104 ppm

Answer :

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Answer:

Option B. 5×10² ppm

Explanation:

In order to determine the concentration of solution at ppm, we should know that ppm indicates mg of solute in 1kg of solution.

We convert the mass of solute from g to mg

0.125 g . 1000 mg / 1g = 125 mg

We convert the mass of solution from g to kg

250 g . 1 kg/ 1000 g = 0.250 kg

ppm = 125 mg / 0.250 kg = 500 ppm

The concentration of this solution, expressed in parts per million

B. 5×10² ppm

The calculation for concentration:

In order to determine the concentration of solution at ppm, we should know that ppm indicates mg of solute in 1kg of solution.

We convert the mass of solute from g to mg

0.125 g . 1000 mg / 1g = 125 mg

We convert the mass of the solution from g to kg

250 g . 1 kg/ 1000 g = 0.250 kg

ppm = 125 mg / 0.250 kg = 500 ppm

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