Hydrochloric acid ratio
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There is 1.9% hydrochloric acid in the tank, which amounts to 3.64 meters of that substance. To adjust the concentration to 7%, how much 30% concentrated hydrochloric acid needs to be added?
What is the volume of 3.6 meters? It seems like they’ve almost forgotten the law of conservation of mass
Just calculate mass conservation. At this level, it’s better not to stay in the chemical industry – switch careers sooner; P
Please make use of the formula M1V1=M2V2. Assuming that the volume of 30% hydrochloric acid is 1000 ML, then 0.3*1000=0.07X1; thus X1=4285 ML. Therefore, 4285-1000=3285 ML, which is the volume of 7% hydrochloric acid before dilution. 0.07*4285=0.019X2, so X2=15786 ML. Hence, 15786-1000=14786 ML, which is the volume of 1.9% hydrochloric acid before dilution. To calculate the volume of 1.9% hydrochloric acid contained in 3.6M solution, one can simply use the ratio to determine how much 30% hydrochloric acid is needed. The above opinions are provided for reference