Question

If 4g of naoh is present in 250 ml of solution then concentration

Answer 1

1 mole of NaOH weighs 40g
So 4g NaOH is 1/40 × 4=0.1moles

Volume of solution is 250ml = 250/1000 litre = 0.25l

So concentration of NaOH in this case is 0.1/0.25 =0.4moles per litre

Hope it helps.... :-)

Answer 2

Hey frnd here is ur answer...

Mass of solute ÷ Mass of solution = concentration percentage.


0.1 ÷ 0.25 = 0.4 %


hopE helped u.....