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Double Displacement Reaction

Which chemica...

Question

Which chemical equation BEST describes the particulate-level diagram of a precipitation reaction?

A

2 N a C l + K_{2} S O_{4} \to 2 K C l + N a_{2} S O_{4}

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B

N a_{2} S O_{4} + 2 A g N O_{3} \to 2 N a N O_{3} + A g_{2} S O_{4}

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C

2 N a C l + C a C O_{3} \to N a_{2} C O_{3} + C a C l_{2}

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D

2 H_{2} O_{2} + M n O_{4}^{-} \to 2 H_{2} O + 3 O_{2} + M n^{2 +}

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Solution

The correct option is B $N a_{2} S O_{4} + 2 A g N O_{3} \to 2 N a N O_{3} + A g_{2} S O_{4}$
$(2 A g N O_{3})$ First vessel $\to 2$ similar ions $+ 2$ similar ions
$(N a_{2} S O_{4})$ Second vessel $\to 2$ similar ions $+ 1$ similar ion.
Third vessel $\to 2 N a N O_{3}$ solution $\to 2$ similar ions $+ 2$ similar ions.
$(A g_{2} S O_{4})$ precipitate $+ 2$ similar ions $+ 1$ similar ion which matches with $B$ .
Answer is not $A$ because $N a_{2} S O_{4}$ is soluble in water.

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Similar questions

Q. Permanent hardness is due to

C l^{⊝}

S O_{4}^{2 -}

M g^{2 +}

C a^{2 +}

and is removed by adding

N a_{2} C O_{3}

C a S O_{4} + N a_{2} C O_{3} \to C a C O_{3} + N a_{2} S O_{4}

C a C l_{2} + N a_{2} C O_{3} \to C a C O_{3} + 2 N a C l

Which of the following statements is/are correct?

Q. Permanent hardness is due to

S O_{4}^{2 -}

C l^{-}

C a^{2 +}

M g^{2 +}

and is removed by the addition of

N a_{2} C O_{3}

.

C a S O_{4} + N a_{2} C O_{3} ⟶ C a C O_{3} + N a_{2} S O_{4}

C a C l_{2} + N a_{2} C O_{3} ⟶ C a C O_{3} + 2 N a C l

100

C a C O_{3}

N a_{2} C O_{3}

required to soften

10

L of hard water is :

2 N a C l + H_{2} S O_{4} ⟶ N a_{2} S O_{4} + H C l

. This reaction occurs when the temperature is :

Q. Identify the type of reaction in the following example.

N a_{2} S O_{4} + B a C l_{2} \to B a S O_{4} + 2 N a C l

64 g

of a mixture of

N a C l

K C l

were treated with concentrated sulphuric acid. The total mass of metal sulphates obtained was found to be %

76 g

. What are the mass percents of

N a C l

in the mixture. The reactions are

2 N a C l + H_{2} S O_{4} \to N a_{2} S O_{4} + 2 H C l

2 K C l + H_{2} S O_{4} \to K_{2} S O_{4} + 2 H C l

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