Question

1m 20 ml hcl reacted with .2 m 30 ml naoh what is molarity of na ion

Answer 1

We begin by writing the equation of the reaction :

HCl (aq) + NaOH (aq) — > NaCl (aq) + H₂O (l)

The mole ratio is 1 : 1

The moles of HCl in 20 ml

20/1000 × 0.1 = 0.002 moles

The moles in 30 ml of NaOH is still 0.002 moles.

The molarity of sodium hydroxide is:

1000/30 × 0.002 = 0.067M