A solution of HNO³ is 5% (w/w) Find the mass of HNO³ Persent in 100ml of solution  (density of solution= 1.4g/ml)

To solve this problem, we need to determine the mass of \( \text{HNO}_3 \) present in 100 mL of a 5% (w/w) solution, given that the density of the solution is \( 1.4 \, \text{g/mL} \).

Here's the step-by-step solution:

### Step 1: Calculate the mass of the solution
Since the density of the solution is \( 1.4 \, \text{g/mL} \), we can calculate the mass of 100 mL of the solution using the formula:

\[
\text{Mass of solution} = \text{Density} \times \text{Volume}
\]

\[
\text{Mass of solution} = 1.4 \, \text{g/mL} \times 100 \, \text{mL} = 140 \, \text{g}
\]

### Step 2: Determine the mass of \( \text{HNO}_3 \)
A 5% (w/w) solution means that 5 grams of \( \text{HNO}_3 \) are present in every 100 grams of solution.

\[
\text{Mass of } \text{HNO}_3 = 5\% \times \text{Mass of solution}
\]

\[
\text{Mass of } \text{HNO}_3 = 0.05 \times 140 \, \text{g} = 7 \, \text{g}
\]

### Final Answer:
The mass of \( \text{HNO}_3 \) present in 100 mL of the solution is **7 grams**.

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Would you like more details or have any questions on this solution?

Here are 5 related questions for further practice:
1. What would be the mass of \( \text{HNO}_3 \) in 200 mL of the same solution?
2. How would the mass of \( \text{HNO}_3 \) change if the solution concentration was 10% (w/w)?
3. What is the volume of the solution required to obtain 10 grams of \( \text{HNO}_3 \)?
4. If the density of the solution changes to \( 1.2 \, \text{g/mL} \), what is the new mass of \( \text{HNO}_3 \) in 100 mL?
5. How is the percentage (w/w) calculated if you know the mass of solute and the mass of solution?

**Tip:** To find the mass of a solute in a solution, remember that you need both the concentration and the total mass of the solution!

A solution of HNO³ is 5% (w/w). Find the mass of HNO³ present in 100 ml of solution (density of solution = 1.4 g/ml).

Learn how to calculate the mass of HNO₃ in a 5% (w/w) solution. This example involves concentration, mass-volume relationships, and the application of density to find the total mass of solution. Suitable for high school chemistry students (Grades 10-12).

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