15mL of 0.40M Mg(OH)2 is required to neutralize 20ml of unknown HCl. What is the concentration of the HCl?

a
0.60 M
b
0.30 M
c
0.15 M
d
0.45 M

The correct answer would be 1. precipitation

Using dilution equationm1v1 =m2v2 ; where m1 and m1 are the intiial and final concentration, and v1 and v2 are the initial and final volume.5  × 5 m = 8 l  × m2m2 = 25/8 = 3.125 mtherefore; the resulting molarity is 3.125 m

H2so4 is the chemical compound of sulfuric acid.