What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution? [Na = 23, O = 16, H = 1]
Question 1 Report
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na = 23, O = 16, H = 1]
[Na = 23, O = 16, H = 1]
Answer Details
To find the concentration of a solution, we need to calculate the number of moles of solute (NaOH) in 100 cm³ of solution.
First, we need to find the molar mass of NaOH:
Na = 23 g/mol, O = 16 g/mol, H = 1 g/mol, so the molar mass of NaOH is 23 + 16 + 1 = 40 g/mol.
We are given that there are 2 g of NaOH in the solution, so the number of moles of NaOH is:
2 g ÷ 40 g/mol = 0.05 mol
Now we can calculate the concentration:
Concentration = Number of moles ÷ Volume of solution
Concentration = 0.05 mol ÷ 0.1 dm³ = 0.5 mol/dm³
So the concentration of the solution is 0.50 mol/dm³.
Therefore, the correct option is:
- 0.50 mol dm⁻³
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