There are 735 g of a 16% solution of iodine in alcohol. You need to get a 10% solution.

There are 735 g of a 16% solution of iodine in alcohol. You need to get a 10% solution. how much alcohol do you need to add to the existing solution?

Let’s calculate how many grams of iodine are in the first solution. Let’s make the proportion:

735 grams – 100%,

x gram – 16%.

x grams = 735 grams * 16%: 100% = 117.6 grams.

Let’s calculate the mass of the resulting solution. Let’s make the equation:

x gram – 100%,

117.6 grams – 10%.

x grams = 117.6 grams * 100%: 10% = 1176 grams.

The mass of the new solution is 1176 grams.

Find out how much alcohol you need to add:

1176 – 735 = 441 grams.

It is necessary to add 441 grams of alcohol.

Answer: you need to add 441 grams of alcohol.