Question

how much amount of sodium hydroxide should be added in 200ml of solution so as to make 0.3m solution.​

Answer 1

Answer:

First find the number of moles of NaOH needed:

200mL NaOH = 0.200L

Number of moles are obtained by multiplying molarity with volume.

Number of moles n =1 mol/L ×0.200 mL =0.200 moles.

Next,

find the mass of NaOH in 0.200 moles of NaOH:

To obtain the mass of NaOH, the number of moles of NaOH are multiplied with its molecular weight which is 40g/mol.

The mass of NaOH =0.200 mol ×40 g/mol =8 g

Therefore 8 gram of NaOH is required.

Explanation:

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Answer 2

Answer:

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