Question

К 180 г 5% раствора бромида калия добавили 120 г воды. Определите массовую долю соли в новом растворе. Ответукажите с точностью до целых. Срочно надо напишите пожалуйста подробнее с дано и тд

Answer 1

Ответ:

Масса раствора: 180+120 = 300 (г)

Масса бромида: 180*0,05 = 9 (г)

Массовая доля соли: 9/300 = 0,03.

Объяснение:

Answer 2

To determine the mass fraction of the salt in the new solution, we need to calculate the mass of the salt and the total mass of the solution.

Given: - Initial mass of the potassium bromide (KBr) solution = 180 g - Mass of water added = 120 g

To find the mass of the salt in the solution, we need to subtract the mass of water from the initial mass of the solution:

Mass of salt = Initial mass of solution - Mass of water Mass of salt = 180 g - 120 g Mass of salt = 60 g

Now, we need to calculate the total mass of the new solution by adding the mass of the salt and the mass of water:

Total mass of the new solution = Mass of salt + Mass of water Total mass of the new solution = 60 g + 120 g Total mass of the new solution = 180 g

Finally, we can calculate the mass fraction of the salt in the new solution by dividing the mass of the salt by the total mass of the solution and multiplying by 100:

Mass fraction of salt = (Mass of salt / Total mass of solution) * 100 Mass fraction of salt = (60 g / 180 g) * 100 Mass fraction of salt = 33.33%

Therefore, the mass fraction of the salt in the new solution is approximately 33%.

Please note that the calculations provided are based on the given information and assumptions.