A poorly worded question. What you want to know is how much H2SO4 was used, not how much xs was used. Technically, none of the excess was used. Did your problem provide an equation. Check and see that it looks like this.
Ca5(PO4)3F + 5H2SO4 ==> 5CaSO4 + 3H3PO4 + HF
If my equation is right 3 g H2SO4 will not dissolve 14 g of fluoroapatite.
Enough concentrated sulfuric acid solution was added to provide 3 grams of sulfuric acid which dissolved i4 grams of pure fluorapatite. How much excess sulfuric acid was used? (report answer in grams of H2SO4
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1 answer