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An aqueous solution contains 300 parts per million of KOH. Determine the number of grams of KOH present in 1000 grams of this soulution

Respuesta :

To determine the number of grams of potassium hydroxide, we need to know what is the units of parts per million and what it means. Then, we can multiply the grams of solution to obtain the grams KOH. Parts per million (ppm) means that there is 1 mass unit of solute per 1 million mass units of solution. Therefore, 

300 ppm = 300 g KOH / 1000000 g solution

mass KOH = 300 g KOH / 1000000 g solution (1000 g solution)
mass KOH = 0.3 g KOH
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The number of grams of KOH present in 1000 grams of this solution is 0.3 grams.

What is a solution?

A solution is a mixture of two or more than two substance.

In these mixtures, a solute is a substance that get dissolved in another substance called solvent.

Given, an aqueous solution contains 300 parts per million KOH

One mass unit of solute per one million mass units of solution is expressed in parts per million (ppm).

Therefore, the mass will be

[tex]\rm 300 ppm = \dfrac{300\; g\; KOH}{1000000\; g\; solution} = 0.3\;g\;KOH[/tex]

Thus, the mass of KOH is 0.3 g.

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