$10 L$ of $2 M N a C l$ solution is subjected to following changes. Calculate final molarity, if it is diluted by $20 L$ :

0.56 M

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0.66 M

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0.76 M

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0.86 M

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Solution

The correct option is A $0.66 M$
The relationship between molarities and volumes before and after dilution is as shown below.
$M_{1} V_{1} = M_{2} V_{2}$
Substitute values in the above expression.
$2 M \times 10 L = M_{2} \times (10 + 20) L$
Hence, $M_{2} = 0.66 M$

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10L of 2MNaCl solution is subjected to following changes. Calculate final molarity, if it is diluted by 20L :

The correct option is A 0.66MThe relationship between molarities and volumes before and after dilution is as shown below.M1V1=M2V2Substitute values in the above expression.2M×10L=M2×(10+20)LHence, M2=0.66M

$10 L$ of $2 M N a C l$ solution is subjected to following changes. Calculate final molarity, if it is diluted by $20 L$ :

The correct option is A $0.66 M$
The relationship between molarities and volumes before and after dilution is as shown below.
$M_{1} V_{1} = M_{2} V_{2}$
Substitute values in the above expression.
$2 M \times 10 L = M_{2} \times (10 + 20) L$
Hence, $M_{2} = 0.66 M$