Q9: A chemical compound 'X' is used in the soap and glass industry. It is prepared from brine.(a) Write the chemical name, common name and chemical formula of 'X'.(b) Write the equation involved in its preparation.(c) What happens when it is treated with water containing Ca or Mg salts? [2020]
Question
Q9: A chemical compound 'X' is used in the soap and glass industry. It is prepared from brine.(a) Write the chemical name, common name and chemical formula of 'X'.(b) Write the equation involved in its preparation.(c) What happens when it is treated with water containing Ca or Mg salts? [2020]
Solution
(a) The chemical compound 'X' referred to here is Sodium Carbonate. Its common name is Soda Ash or Washing Soda. The chemical formula for Sodium Carbonate is Na2CO3.
(b) Sodium Carbonate is prepared from brine (a solution of Sodium Chloride, NaCl, in water) through a two-step process. First, Sodium Hydroxide (NaOH) is produced by the electrolysis of brine. This is followed by the reaction of Sodium Hydroxide with Carbon Dioxide (CO2) to produce Sodium Carbonate. The equations for these reactions are:
2NaCl + 2H2O → 2NaOH + Cl2↑ + H2↑ NaOH + CO2 → Na2CO3 + H2O
(c) When Sodium Carbonate is treated with water containing Calcium or Magnesium salts, it reacts to form insoluble precipitates of Calcium Carbonate or Magnesium Carbonate. This is the reason why Sodium Carbonate is used in softening hard water. The equations for these reactions are:
Na2CO3 + CaCl2 → CaCO3↓ + 2NaCl Na2CO3 + MgCl2 → MgCO3↓ + 2NaCl
Similar Questions
A solution of a substance ‘X’ is used for white washing.(i) Name the substance ‘X’ and write its formula.(ii) Write the reaction of the substance ‘X’ named in (i) above withwater
1: Write the chemical equation involved in the preparation of sodium hydroxide? Name theprocess .2: Why does bleaching powder smell strongly of chlorineand does not dissolve completely in water?
X is an artificial or man-made inorganic salt, that causes soil and water pollution and is soluble in water. Identify X.Select an answerACompostBVermicompostCFertilizerDManure
Salts are ionic compounds . Name the salt that forms when calcium oxide reacts withhydrochloric acid . Write which ions it contains ? [2
A compound 'X' combines with water, is a exothermic reaction and forms product 'Y' is used for white washing of walls. Identify 'X' and 'Y' respectively.CaCO3, Ca(OH)2CaO, CaCO3CaO, Ca(NO3)2CaO, Ca(OH)2
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.