Question

10 кг. раствора содержит кислоты в 4 раза меньше чем воды. а)сколько кг. воды растворе? б)какова концентрация раствора?

Answer 1

а) берём за х количество кислоты, тогда количество воды будет 4х

х+4х=10

5х=10

х=10:5=2 кг - количество кислоты

2*4=8 кг - количество воды

б) составляем пропорцию, где х - это процент кислоты в растворе:

10кг-100%

2кг-х%

х=2*100:10=20% - концентрация раствора

 

Answer 2

Question Analysis

The question asks for a detailed answer to two parts: a) How many kilograms of water are in the solution? b) What is the concentration of the solution?

Answer

To find the answer, we need to use the information given in the question. Let's break it down step by step.

a) To determine the amount of water in the solution, we need to compare the amount of acid to the amount of water. The question states that the solution contains 4 times less acid than water. Let's assume the weight of the acid in the solution is A kg and the weight of the water is W kg.

According to the given information, we can write the equation: A = W/4

We also know that the total weight of the solution is 10 kg. Therefore, we can write another equation: A + W = 10

Now we can solve these two equations to find the values of A and W.

b) The concentration of a solution is usually expressed as the amount of solute (in this case, acid) dissolved in a given amount of solvent (in this case, water). To find the concentration, we need to divide the weight of the acid (A) by the weight of the water (W).

Let's calculate the values of A, W, and the concentration of the solution.

Calculation

Let's solve the equations to find the values of A and W.

From the equation A = W/4, we can substitute this value into the second equation:

W/4 + W = 10

Multiplying both sides of the equation by 4 to eliminate the fraction:

W + 4W = 40

Combining like terms:

5W = 40

Dividing both sides by 5:

W = 8

Now we can substitute this value back into the equation A = W/4:

A = 8/4 = 2

So, the solution contains 2 kg of acid and 8 kg of water.

To find the concentration of the solution, we divide the weight of the acid (2 kg) by the weight of the water (8 kg):

Concentration = 2 kg / 8 kg = 0.25

Answer

a) The solution contains 8 kg of water. b) The concentration of the solution is 0.25.

Please note that the calculations are based on the information provided in the question and may not reflect real-world scenarios.