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ICSE-X-Chemistry

03: Acids, Bases and Salts

with Solutions - page 2
Qstn# A-12 Prvs-QstnNext-Qstn
  • #12
    How is an acid prepared from a  (a) Non-metal  (b) Salt? 
    Give an equation for each. 
    Ans : 12 Acids are prepared from non-metals by their oxidation. For example : Sulphur or phosphorus is oxidized by conc. Nitric acid to form sulphuric acid or phosphoric acid.
    S + 6HNO3  â†’ H2SO4 + 2H2O  + 6NO2
    P + 5HNO3 â†’ H3PO4 + H2O + 5NO2
    Acids are prepared from salt by a displacement reaction. For example :
    Nitric acid is prepared by using H2SO4 and sodium chloride.
    NaCl + H2SO4  â†’ NaHSO4 + HNO3