What is the molarity of a koh solution if it requires 20 milliliters of 2.0m hcl to exactly neutralize 20 milliliters of the koh solution? a. 1.0m b. 2.0m c. 10m d. 20m

KOH + HCl     >    KCl +H2O

From the reaction we can see that
number of moles KOH = number of mole HCl
M - molarity, V - vloume, n -number of moles

n=MV
M(KOH)*V(KOH) = M(HCl)*V(HCl)
M(KOH)*20 ml = 2.0*V(HCl)*20 ml
M(KOH) = 2*20/20=2
Answer B. 2.0 M

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