If I add 0.348 liters of 5.25% bleach(Sodium Hypochlorite) into 4 liters of water, what is my concentration in ppm ?
I guess this is w/w
I think I got it - Please verify
Given:
c1v1=c2v2
MW of Sodium Hypochlorite = 74 grams/mol
5.25% = 52,500ppm = 52500 mg/l
calculating c1:
((52500mg/l)*(1mMol/74mg))/ (1liter/1000ml) = 0.709 mol/l or 0.709 M
rearranging c1v1=c2v2 for C2 gives:
C2= (0.709*0.348)/4 = 0.062 mol/l or 0.062M
Coverting 0.062 M to ppm
(0.062 mol/l)(1000mMol/mol)(74mg/mMol) = 4588 mg/l = 4588 ppm
Converting to %
4588ppm *(1%/10,000ppm)= 0.4588% Sodium Hypochlorite Solution
How'd I do?
I followed to this step and stopped.
The final volume is 4.348 (assuming the volumes are additive) and not 4. The problem states that 0.348 L is ADDED to 4L.
rearranging c1v1=c2v2 for C2 gives:
C2= (0.709*0.348)/4 = 0.062 mol/l or 0.062M
Additionally I think there are some rounding errors here and there.
I would stick with the solution in my earlier post.
To determine the concentration in ppm (parts per million), we need to calculate the amount of sodium hypochlorite in the mixture. Here's how you can do it:
Step 1: Calculate the amount of sodium hypochlorite in liters.
To find the amount of sodium hypochlorite, we multiply the volume (in liters) of the bleach by its concentration. In this case, you have 0.348 liters of bleach and the concentration is 5.25%.
Amount of sodium hypochlorite = 0.348 liters * 0.0525 = 0.01827 liters
Step 2: Convert liters to milliliters.
To convert liters to milliliters, multiply the amount of sodium hypochlorite by 1000.
Amount of sodium hypochlorite in milliliters = 0.01827 liters * 1000 = 18.27 milliliters
Step 3: Calculate the total volume of the mixture.
The total volume of the mixture is the sum of the volume of water and the volume of bleach added.
Total volume = 4 liters + 0.348 liters = 4.348 liters
Step 4: Calculate the concentration in ppm.
Concentration (ppm) = (Amount of sodium hypochlorite in milliliters / Total volume in milliliters) * 1,000,000
Concentration (ppm) = (18.27 ml / 4348 ml) * 1,000,000 = 4201.5 ppm (rounded to the nearest tenth)
Therefore, the concentration of sodium hypochlorite in the mixture is approximately 4201.5 ppm.