Chemistry
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCl, Fe, H2SO4, Cl2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare :
(a) iron (III) chloride
(b) sodium sulphate
(c) sodium zincate
(d) iron (II) sulphate
(e) sodium chloride
Acids Bases Salts
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Answer
(a) Iron (III) Chloride: By synthesis i.e., direct combination of elements.
2Fe + 3Cl2 ⟶ 2FeCl2
(b) Sodium sulphate: By neutralisation of an alkali (caustic soda) with acid (dilute sulphuric acid)
2NaOH + H2SO4 ⟶ Na2SO4 + 2H2O
(c) Sodium zincate: By the action of metals with alkalis
Zn + 2NaOH ⟶ Na2ZnO2 + H2
(d) Iron (II) sulphate: Method of Simple Displacement by the action of dilute acid (H2SO4) on an active metal (iron).
Fe + H2SO4 (dil.) ⟶ FeSO4 + H2
(e) Sodium chloride: By the neutralisation reaction of strong acid (HCl) with strong base (NaOH) also known as titration NaOH + HCl ⟶ NaCl + H2O
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Related Questions
Complete the following table and write one equation for each to justify the statement:
Reactants Products Method Soluble base + Acid (dil) Salt + water Neutralisation
TitrationMetal + Non-metal Salt (soluble/insoluble) …………… Insoluble base + …………… Salt (soluble) + water …………… Active metal + Acid (dil) …………… + …………… …………… Soluble salt solution (A) + Soluble salt solution (B) Precipitated salt + soluble salt …………… Carbonate/bicarbonate + Acid (dil) Salt + …………… + …………… Decomposition of carbonate Chlorides/nitrates + Acid (conc.) …………… + …………… Decomposition of chlorides and nitrates. Write the balanced equations for the preparation of the following salts in the laboratory.
(a) A soluble sulphate by the action of an acid on an insoluble base,
(b) An insoluble salt by the action of an acid on another salt,
(c) An insoluble base by the action of a soluble base on a soluble salt,
(d) A soluble sulphate by the action of an acid on a metal.
For each of the salt : A, B, C and D, suggest a suitable method of it's preparation.
(a) A is a sodium salt,
(b) B is an insoluble salt,
(c) C is a soluble salt of copper
(d) D is a soluble salt of zinc.
Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(a) Sodium sulphate
(b) Copper sulphate
(c) Iron (II) sulphate
(d) Zinc carbonate
Dilute sulphuric acid Copper Copper carbonate Iron Sodium carbonate Sodium Zinc