(Solved): Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in ...

Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq), For example, sodium silicate, \( \mathrm{Na}_{2} \mathrm{SiO}_{3} \), reacts in the following way. \[ \mathrm{Na}_{2} \mathrm{SiO}_{3}(5)+8 \mathrm{HF}(a q) \rightarrow \mathrm{H}_{2} \mathrm{SiF}_{6}(a q)+2 \mathrm{NaF}(a q)+3 \mathrm{H}_{2} \mathrm{O}(I) \] (a) How many moles of \( \mathrm{HF} \) are required to dissolve \( 0.80 \) mol of \( \mathrm{Na}_{2} \mathrm{SiO}_{3} \) ? \[ \text { mel } \] (b) How many grams of NaF form when \( 0.100 \) mol of HF reacts in this way? 9 (c) How many grams of \( \mathrm{Na}_{2} \mathrm{SiO}_{3} \) can be dissolved by \( 0.300 \mathrm{~g} \) of \( \mathrm{HF} \) ? 9