Question

.To make a saturated solution,36 g of sodium chloride is dissolved in 300 g of water at 293K. Find the concentration of the solution at this temperature

Answer 1

Answer:

2.05 M

Explanation:

Let's find molarity.

Mole = Given mass / Molar mass

Molarity = Moles of solute / Litres of solution

step 1 : Take 300 ml SMF ( Standard measuring flask)

step 2 : Put 36 gram salt in smf and then add water upto mark in smf.

step 3 : Now we have prepared the required concentration solution.

let's see how to find concentration. Always use this formula. Put the required volume of solution in the place of 300.

Molarity = Given weight × 1000 / Molar mass × 300

= 36 × 1000 / 58.5 × 300

= 2.05 M

Extra information:

1. one Molar solution means one mole substance in one litre solution.

2. Half molar solution means half mole substance, one litre solution.

3. To fine mole, we have to use this formula.

(Given mass / molar mass)

4. Molar mass is the sum of atomic masses of all atoms present in the chemical formula.

5. We should use average atomic mass which is given in periodic table because we have many isotopes for each atoms.