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NEET Chemistry Solutions / विलयन Question Bank Self Evaluation Test - Solutions

  • question_answer
    Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M first solution +520 mL of 1.2 M second solution. What is the molarity of the final mixture?

    A) 2.70 M             

    B) 1.344 M

    C) 1.50 M                          

    D) 1.20 M

    Correct Answer: B

    Solution :

    [b] From the molarity equation. \[{{M}_{1}}{{V}_{1}}+{{M}_{2}}{{V}_{2}}=MV\] \[M=\frac{{{M}_{1}}{{V}_{1}}+{{M}_{2}}{{V}_{2}}}{V}\] where \[V={{V}_{1}}+{{V}_{2}}\] \[M=\frac{480\times 1.5+520\times 1.2}{480+520}=1.344M\]


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