Answer

Verified

420k+ views

**Hint:**In this question, first the number of moles of oxalic acid is calculated before and after adsorption in charcoal using the formula of molarity where number of moles is divided by volume of solution. Then the mass of oxalic acid is calculated by the formula where moles is equal to mass divided by molecular weight.

**Complete step by step answer:**

Given,

Volume of oxalic acid is 50mL.

Molarity of oxalic acid is 1M.

Mass of wood charcoal is 0.5gm.

Volume of oxalic acid after adsorbed is 0.5M.

To calculate the molarity number of moles of solute is divided by volume of solution.

The formula for calculating molarity is shown below.

\[M = \dfrac{n}{V}\]

Where,

M is the molarity

n is the number of moles

V is the volume.

To calculate the number of moles, substitute the values in the above equation.

\[ \Rightarrow 1M = \dfrac{n}{{0.05L}}\]

\[ \Rightarrow n = 1M \times 0.05L\]

\[ \Rightarrow n = 0.05mol\]

The remaining molarity after adsorption is 0.5 M, so the number of remaining moles is calculated as shown below.

\[ \Rightarrow 0.5M = \dfrac{n}{{0.05L}}\]

\[ \Rightarrow n = 0.5M \times 0.05L\]

\[ \Rightarrow n = 0.025mol\]

The number of moles of oxalic acid adsorbed by charcoal is calculated as shown below.

\[ \Rightarrow 0.05 - 0.025\]

\[ \Rightarrow 0.025\]

0.025 moles of oxalic acid will be adsorbed on 0.5g charcoal.

1 gm of charcoal will adsorb \[\dfrac{{0.025}}{{0.5}} = 0.05mol\] of oxalic acid.

The formula to calculate the number of moles is given below.

\[n = \dfrac{m}{M}\]

n is number of moles.

m is given mass.

M is molecular weight

The molecular weight of oxalic acid is 126g/mol.

To calculate the mass of oxalic acid, substitute the value in the equation.

\[ \Rightarrow 0.05mol = \dfrac{m}{{126g/mol}}\]

\[ \Rightarrow m = 0.05mol \times 126g/mol\]

\[ \Rightarrow m = 6.30g\]

Thus, the mass of oxalic acid absorb per gram of charcoal is 6.30g.

**So, the correct answer is Option C.**

**Note:**As you can see that the given volume is present in milliliters and the volume used in the formula is in terms of liters. So make sure to convert mL into L as molarity is calculated in terms of mol per liter.

Recently Updated Pages

How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE

Mark and label the given geoinformation on the outline class 11 social science CBSE

When people say No pun intended what does that mea class 8 english CBSE

Name the states which share their boundary with Indias class 9 social science CBSE

Give an account of the Northern Plains of India class 9 social science CBSE

Change the following sentences into negative and interrogative class 10 english CBSE

Trending doubts

Difference Between Plant Cell and Animal Cell

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Which are the Top 10 Largest Countries of the World?

Give 10 examples for herbs , shrubs , climbers , creepers

Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE

How do you graph the function fx 4x class 9 maths CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths

Change the following sentences into negative and interrogative class 10 english CBSE