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2 years ago

30g of naoh is dissolved in 1.5 liter solution the active mass of naoh is?

Chemistry

1 answer:

Pepsi [2]2 years ago

7 0

Answer:

0.5mol/L

Explanation:

First, let us calculate the number of mole NaOH = 23 + 16 + 1 = 40g/mol

Mass of NaOH from the question = 30g

Number of mole = Mass /Molar Mass

Number of mole = 30/40 = 0.75mol

Volume = 1.5L

Active mass = mole/Volume

Active mass = 0.75mol/1.5L

Active mass = 0.5mol/L

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2 years ago

A stock solution of HNO3 is prepared and found to contain 13.5 M of HNO3. If 25.0 mL of the stock solution is diluted to a final

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Answer : The correct option is, (C) 0.675 M

Explanation :

Using neutralization law,

$M_1V_1=M_2V_2$

where,

$M_1$ = concentration of $HNO_3$ = 13.5 M

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conversion used : (1 L = 1000 mL)

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Now put all the given values in the above law, we get the concentration of the diluted solution.

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$M_2=0.675M$

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