Question

2 M, 500 ml NaOH solution is mixed with 1 M, 500 ml NaOH solution. The molarity of resultant solution becomes (1) 1 M (2) 1.5M (3) 2M (4) 3M​

Answer 1

Answer:

1.5M

Explanation:

Molarity=$\frac{moles}{volume in Litre}$

in 1st solution

NaOH is2M,500ml(0.5L)

moles of NaOH =2*0.5=1mol

in 2nd solution

NaOHis 1M, 500ml(0.5L)

moles of NaOH = 1*0.5=0.5mol

total moles of NaOH= 1+0.5=1.5mols

total volume =0.5+0.5=1L

molarity; [NaOH]=$\frac{1.5}{1}$= 1.5M