Question

рассчитай молярную концентрацию раствора натрия калия (KNO3) если в 2 л раствора содержится 50,5 соли ​

Answer 1

Ответ:

Дано

m=50,5

V=2л=2000ml

M(KNO3)=101

n=50,5/101=0,5моль

См=n*1000/V

Cm=0,5*1000/2000=0,25M

Answer 2

Calculating Molar Concentration of Potassium Nitrate (KNO3) Solution

To calculate the molar concentration of the potassium nitrate (KNO3) solution, we can use the formula:

Molar concentration (M) = moles of solute / volume of solution in liters

Given: - Volume of solution (V) = 2 L - Amount of solute (KNO3) = 50.5 g

First, we need to convert the amount of solute from grams to moles using the molar mass of KNO3, which is 101.1032 g/mol.

Step 1: Convert grams of KNO3 to moles ``` Moles of KNO3 = mass of KNO3 / molar mass of KNO3 = 50.5 g / 101.1032 g/mol ≈ 0.499 moles ```

Step 2: Calculate molar concentration ``` Molar concentration (M) = moles of solute / volume of solution in liters = 0.499 moles / 2 L ≈ 0.25 M ```

Answer

The molar concentration of the potassium nitrate (KNO3) solution is approximately 0.25 M.