How would I calculate the mass of 20ml of a 3% hydrogen peroxide from a 30% H2O2 solution?
Is that 3% w/w? w/v? Do you have a density for the 3% solution? I'm still trying to figure out what the 30% solution has to do with your question.
The question says calculate the mass or volume required to make the following solution.
20mL of a 3% hydrogen peroxide solution from a 30% H2O2 solution.
OK. I assume that's 3% w/w and 30% w/w. Then 20 g x 3% = g x 30%
Solve for g = 2g of the 30% and make up to 20 mL .
Another way.
The solution is to be diluted fromj 30$ to 3% or a factor of 10. That'a dilution of 1part H2O2 + 9 parts H2O.
1 part is 20/10 = 2 so 2 mL 30% H2O2 + 9*2 = 18 mL H2O to make 20 mL.
Well, calculating the mass of 20ml of a 3% hydrogen peroxide solution from a 30% H2O2 solution can be quite a puzzle. But fear not, I can assist you with a smile!
First, we should recognize that the mass of a solution is determined by both the concentration and volume.
To find the mass of the 3% hydrogen peroxide solution, we can follow these steps:
1. Determine the mass of the 30% H2O2 solution:
Let's assume the density of the 30% solution is 1.1 g/ml. So, the mass of 20ml of the 30% H2O2 solution would be 20ml x 1.1 g/ml = 22 grams.
2. Calculate the mass of hydrogen peroxide within the 30% solution:
Since the 30% H2O2 solution contains 30 grams of hydrogen peroxide in 100 ml of solution, we can use this ratio to determine the amount in 20 ml of the 30% solution:
(30g/100ml) x 20ml = 6 grams of hydrogen peroxide.
3. Calculate the mass of the 3% H2O2 solution:
The 6 grams of hydrogen peroxide is now within a 20 ml solution. Since the concentration is 3%, we can use the ratio to find the mass:
(6g/100ml) x 20 ml = 1.2 grams.
Therefore, the mass of 20ml of a 3% hydrogen peroxide solution from a 30% H2O2 solution is approximately 1.2 grams. Keep in mind that these calculations are based on assumptions, so double-check them if you need precise results.
To calculate the mass of 20ml of a 3% hydrogen peroxide solution, you'll need to consider the mass concentration of the original 30% H2O2 solution. Here's how you can do that:
Step 1: Determine the mass of the original 30% H2O2 solution.
Let's assume you have a certain volume of the 30% H2O2 solution. For example, suppose you have 100ml of the 30% solution. To calculate the mass, you need to multiply the volume (in mL) by the density (in g/mL) of the solution.
Density of 30% H2O2 solution: 1.11 g/mL (this value may vary depending on the concentration and temperature, so please use the appropriate value).
Mass of original 30% H2O2 solution:
100 mL x 1.11 g/mL = 111 g
Step 2: Calculate the mass of the desired 3% H2O2 solution.
To find the mass of the 20ml of 3% H2O2 solution, you'll use the mass concentration and solve the proportion.
Mass concentration of 3% H2O2 solution: 3 g/100 mL.
Since we know the concentration in terms of grams per 100 mL, we can set up the following proportion:
3 g/100 mL = X g/20 mL
Cross-multiplying and solving the proportion:
100 mL * X g = 3 g * 20 mL
100X = 60
X = 0.6 g
Therefore, the mass of 20 mL of a 3% hydrogen peroxide solution from a 30% H2O2 solution is 0.6 g.