Question

Растворить 5 г водной соли NaOH в 500 мл воды. Найдите молярную концентрацию этих растворов.​ 500 мл суда 5 г NaOH су тұзы ерітілді. Осы ертінділердін моларлық концентрациясын тап

Answer 1

Ответ:

ДАНО:

V=500 мл

м(в-ва)=5 г

С-?

РЕШЕНИЕ

С=мв-ва/mr×V

Mr= 16+1+23=40 г/моль

С=5 г/ 40 г/моль×500мл=0,00025мл/моль

Объяснение:

Не знаю правильно ли у меня. но как смогла так и помогла

Answer 2

Calculating Molar Concentration of NaOH Solution

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

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

First, let's calculate the moles of NaOH in the given solution.

Given: - Mass of NaOH = 5 g - Volume of water = 500 ml

Calculating Moles of NaOH

The molar mass of NaOH is approximately 40 g/mol (sodium: 23 g/mol, oxygen: 16 g/mol, hydrogen: 1 g/mol).

Using the formula: Moles = Mass / Molar mass

We can calculate the moles of NaOH: Moles = 5 g / 40 g/mol

This gives us the moles of NaOH in the solution.

Calculating Molar Concentration

Now, we can use the formula for molar concentration: Molar concentration (M) = moles of solute / volume of solution in liters

Given: - Volume of solution = 500 ml = 0.5 liters

We can now calculate the molar concentration of the NaOH solution using the moles of NaOH and the volume of the solution.

Molar concentration (M) = moles of NaOH / volume of solution

Let's calculate the molar concentration using the values we've obtained.

Result

The molar concentration of the NaOH solution can be calculated as follows: Molar concentration (M) = moles of NaOH / volume of solution Molar concentration (M) = (5 g / 40 g/mol) / 0.5 L

The result will give us the molar concentration of the NaOH solution.