Hydrogen fluoride is produced by the reaction below. At most, how many grams of hydrofluoric acid can be prepared by the reaction of 22.5 g of CaF2 and 36.0 g of H2SO4?

(CaF2 = 78.08 g/mol; H2SO4 = 98.08 g/mol; CaSO4 = 136.12 g/mol; HF = 20.01 g/mol)

CaF2 + H2SO4 --> 2 HF + CaSO4

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Lelia LubowitzLv2

23 May 2019

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How to calculate this 2 questions? I want detail,thank you ï¼ï¼ï¼

Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium silicate (Na₂SiO₃), for example, reacts as follows:

Na₂SiO₃(s) + 8 HF(aq) H₂SiF₆(aq) + 2 NaF(aq) + 3 H₂O(l)

(a) How many moles of HF are needed to react with 0.300 mol of Na₂SiO₃?
(b) How many grams of NaF form when 0.500 mol of HF reacts with excess Na₂SiO₃?
(c) How many grams of Na₂SiO₃ can react with 0.800 g of HF?