How can prepare 10 percent ammonia solution from 26 percent ammonia solution
The Correct Answer and Explanation is :
To prepare a 10% ammonia solution from a 26% ammonia solution, you’ll need to perform a dilution calculation. Here’s how you can do it, along with an explanation of the process.
Required Materials
- 26% ammonia solution
- Distilled water
- A graduated cylinder or volumetric flask
- A mixing container
Calculation
To determine how much of the 26% solution you need to dilute to achieve a 10% solution, you can use the dilution formula:
[
C_1V_1 = C_2V_2
]
Where:
- (C_1) = initial concentration (26%)
- (V_1) = volume of the concentrated solution you need
- (C_2) = final concentration (10%)
- (V_2) = final volume of the diluted solution
Let’s say you want to prepare 1 liter (1000 mL) of a 10% ammonia solution.
- Set (V_2) = 1000 mL.
- Substitute the values into the equation:
[
26\% \times V_1 = 10\% \times 1000 \, \text{mL}
]
- Convert the percentages to decimals:
[
0.26 \times V_1 = 0.10 \times 1000
]
- Calculate:
[
0.26V_1 = 100
]
[
V_1 = \frac{100}{0.26} \approx 384.62 \, \text{mL}
]
This means you need approximately 384.62 mL of the 26% ammonia solution.
- To find out how much distilled water to add, subtract the volume of the concentrated solution from the total desired volume:
[
\text{Volume of water} = 1000 \, \text{mL} – 384.62 \, \text{mL} \approx 615.38 \, \text{mL}
]
Procedure
- Measure 384.62 mL of the 26% ammonia solution using a graduated cylinder.
- Measure approximately 615.38 mL of distilled water in another container.
- Slowly add the ammonia solution to the water while stirring to ensure thorough mixing. Never add water to ammonia, as it can generate heat and cause splattering.
- Once mixed, you have a 10% ammonia solution ready for use.
Safety Precautions
- Always wear gloves and goggles when handling ammonia.
- Work in a well-ventilated area or under a fume hood.
- Store the solution properly after preparation.
By following this process, you can accurately dilute a 26% ammonia solution to achieve a 10% concentration, ensuring safety and accuracy in your preparation.