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Question
- What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride?
- Write the balanced chemical equation for the reaction which takes place.
- State the physical conditions of reactants in which the reaction will not take place.
- Name the type of chemical reaction which occurs.
- Give one example of another reaction which is of the same type as the above reaction.
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Solution
- When aqueous sodium sulphate reacts with aqueous barium chloride, a white, insoluble precipitate of barium sulphate forms, along with a solution of sodium chloride.
- \[\ce{Na2SO4_{(aq)} + BaCl2_{(aq)} -> BaSO4_{(s)} + 2NaCl_{(aq)}}\]
- The reaction will not take place when sodium sulphate and barium chloride are in the solid (dry) state, because ions are not free to move and exchange.
- Double displacement reaction
- \[\ce{Pb(NO3)2_{(aq)} + 2KI_{(aq)} -> PbI2_{(s)} + 2KNO3_{(aq)}}\]
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RELATED QUESTIONS
Give an example of a double displacement reaction other than the one given in the following Activity.
•Take about 3 mL of sodium sulphate
solution in a test tube.
• In another test tube, take about 3 mL of
barium chloride solution.
• Mix the two solutions given in the following fig.
• What do you observe?
Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.
What type of chemical reaction is represented by the following equation?
\[\ce{PQ + RS -> PS + RQ}\]
What type of reaction is represented by the following equation?
\[\ce{CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4}\]
Fill in the blank
In the type of reaction called ....................................., ions two compounds exchange their positive and negative radicals ions respectively.
Explain the following type of chemical reaction, giving two examples for it:
Double displacement reaction
The aqueous solutions of copper sulphate and zinc sulphate appear
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(B) green and colourless respectively
(C) blue and brown respectively
(D) blue and colourless respectively.
Identify the type of reaction taking place in the following case and write the balanced chemical equation for the reaction.
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
Differentiate between displacement reaction and a neutralization reaction.
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In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?
In a double displacement reaction ______.
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Write balanced chemical equation for the following word equation.
Lead nitrate + Potassium iodide → Lead iodide + Potassium nitrate
Is this a double displacement reaction? Justify your answer. Name the compound precipitated and write the ions present in it.
Write the method of preparation of Ca(OH)2. What happens when CO2 is passed through it? Write balanced chemical equation for the reaction involved.
Give an example of a double displacement reaction.
