Can someone show me how to do this? What volumes of 60% hydrochloric acid solution and 30% hydrochloric acid solution must be mi
xed to make 125mL of 36% hydrochloric acid solution?
1 answer:
<span>
u need two equations.</span><span>x + y = 125
0.60x + 0.30y = (0.36)(125)</span>
<span /><span>x + y = 125
0.60x + 0.30y = 45</span>
<span>solve for a variable in the first equation
y = 125 - x</span>
<span>plug into the second equation
0.60x + 0.30(125 - x) = 45
0.60x + 37.5 - 0.30x= 45
0.30x + 37.5 = 45
0.30x = 7.5
x = 25</span>
<span>plug the answer for x into the first equation
25 + y = 125
y = 100</span>
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