Question

Вычислить навеску йодида калия для приготовления 200 граммов 5% раствора.

Answer 1

Ω=m(вещ-ва)/m(раствора)
m(вещ-ва)= ω*m(раствора)=200 г * 0,05 = 10 г
Ответ: 10г. 

Answer 2

Calculating Potassium Iodide for 200 Grams of 5% Solution

To calculate the amount of potassium iodide needed to prepare a 200-gram 5% solution, we can use the formula:

% Concentration = (Mass of solute / Volume of solution) x 100

Given: - Mass of solute (potassium iodide) = ? - Volume of solution = 200 grams - % Concentration = 5%

Using the formula, we can rearrange it to solve for the mass of the solute:

Mass of solute = (% Concentration x Volume of solution) / 100

Substituting the given values: Mass of solute = (5% x 200g) / 100

Calculating: Mass of solute = (0.05 x 200g) Mass of solute = 10g

Therefore, to prepare a 200-gram 5% solution of potassium iodide, you would need 10 grams of potassium iodide.

[[SOURCE #1]]