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To a 4 L of 0.2 M solution of NaOH 2 L of 0.5 M NaOH are added. The molarity of resulting solution is

Options

  1. A0.9 M
  2. B0.3 M
  3. C1.8 M
  4. D0.18 M

Correct answer

B. 0.3 M

Step-by-step solution

aligned & Total moles of NaOH =4 0.2+2 0.5 & & =0.8+1.0=1.8 & aligned Total volume & =4+2=6 ~L Molarity & = 1.8 6 & =0.3 M aligned aligned

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