Precipitation Reaction
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; the above reaction is an example of ___ reaction.
An unknown metal x when placed in copper sulphate solutions give a red brown precipitate. When placed in magnesium sulphate solutions, give no reaction. Identify element x?
When lead nitrate reacts with potassium iodide, yellow precipitate of
PbI2 is formed
KNO3 is formed
Pb(NO3)2 is formed
KI is formed
Define:
(a) precipitation (b) neutralization
(c) catalyst
CuSO4 (aq) + H2S (g) → CuS (ppt) + H2SO4(aq)
What is the colour of precipitate formed in the above precipitation reaction?
Black
Blue
Yellow
White
In the type of reaction in which __________compounds exchange their positive and negative radicals called_________
- True
- False
Identify following substances which are underlined.
Dilute mineral acid which forms of white precipitate when treated with barium chloride solution
On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, a white precipitate is obtained.
- Write a balanced chemical equation of the reactions involved.
- What other name can be given to this precipitation reaction?
- On adding dilute hydrochloric acid to the reaction mixture, white precipitation disappears, why?
- Iodide ion
- Chloride ion
- Sulphate ion
- Bromide ion
A aqueous reaction in which an insoluble product (precipitate) is formed is called
- two, one
- two, two
- four, two
- four, four
The following equation represents double displacement reaction, what is the precipitate formed in this reaction?
AgNO3(aq)+NaI(aq)→AgI(s)+NaNO3(aq)
Silver iodide
Sodium nitride
Sodium iodide
Silver nitrate
- True
- False
A aqueous reaction in which an insoluble product (precipitate) is formed is called
A aqueous reaction in which an insoluble product (precipitate) is formed is called
In a solution of potassium chloride when mixed with the silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of chemical reaction.
The following equation represents double displacement reaction, what is the precipitate in this reaction?
AgNO3(aq)+NaI(aq)→AgI(s)+NaNO3(aq)
Silver iodide
Sodium nitride
Sodium iodide
Silver nitrate
When a few drops of dilute nitric acid, followed by a few drops of barium nitrate solution were added to the 2nd portion, a white precipitate was formed. From these observations deduce the identity of substance.
AgNO3(aq) + HCl(aq) → Product
In the above reaction, the product formed as a precipitate is :
NaNO3
AgCl
Ag
Na
What can be inferred from the following equation?
Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq)
(i) It is a double displacement reaction.
(ii) It is a precipitation reaction.
(iii) It is a decomposition reaction.
(iv) BaSO4 is soluble in water
(v) BaSO4 is precipitate.
(vi) NaCl dissolves in water.
(i), (iii), (v), (vi).
(i), (ii), (v), (vi).
(i), (ii), (iv), (vi).
(ii), (iii), (iv), (vi).
Identify the following substance which are underlined:
(i) A dilute mineral acid that forms a white precipitate when treated with barium chloride solution.
On combining two aqueous solutions of soluble ionic compounds, a precipitate is formed when
the solvent is insoluble.
the reactant is insoluble.
the product is insoluble.
a gas is evolved.
A aqueous reaction in which an insoluble product (precipitate) is formed is called