Question

В емкость,содержащую 12 кг 8%- ного раствора вещества,добавили 4 кг воды. Сколько процентов составляет концентрация получившегося раствора?

Answer 1

Вещества в растворе 0,08*12 кг=0,96 кг

теперь раствора  4+12=16 кг

концентрация нового раствора 0,96*100%/16=6%

Answer 2

Calculation of Concentration

To calculate the concentration of the resulting solution, we need to consider the initial concentration of the substance and the amount of water added.

Given: - Initial solution weight: 12 kg - Initial solution concentration: 8% - Water added: 4 kg

To find the concentration of the resulting solution, we can use the formula:

Concentration = (Weight of Substance / Total Weight) * 100

Let's calculate the concentration of the resulting solution step by step:

1. Calculate the weight of the substance in the initial solution: - Weight of Substance = Initial Solution Weight * Initial Solution Concentration - Weight of Substance = 12 kg * 8% = 0.96 kg

2. Calculate the total weight of the resulting solution: - Total Weight = Initial Solution Weight + Weight of Water Added - Total Weight = 12 kg + 4 kg = 16 kg

3. Calculate the concentration of the resulting solution: - Concentration = (Weight of Substance / Total Weight) * 100 - Concentration = (0.96 kg / 16 kg) * 100 - Concentration = 6%

Therefore, the concentration of the resulting solution is 6%.

Conclusion

After adding 4 kg of water to a container containing 12 kg of an 8% solution, the concentration of the resulting solution is 6%.