Calculate [ClO^-] in a 6% bleach solution. A 6% bleach solution contains 6 grams of NaClO per 100 grams bleach. The density of 6% bleach is 1.07g/mL.
Percent w/w is a perfectly good concentration to use. What do you want it in? molarity.
6g/100 g soln.
mols in 6g = 6/molar mass NaClO.
100 g soln converted to L is ?
volume = mass/density 100/1.07 = ?
So M = mols/L soln. Substitute mols and L and you have it. (That's the molarity of NaClO but it also is M ClO^-
Then calculate the inital ClO^- concencentrations for 1st, 2nd, and 3rd reactions.
Chemical reaction: Blue dye + ClO^- -->oxidized dye +Cl^-
Reaction #1: 5.0 mL or diluted bleach solution, 15.0mL of distilled water, 10.0 mL of diluted blue dye
Reaction #2: 10.0mL of diluted bleach solution, 10.0mL distilled water, 10.0mL diluted blue dye
Reaction #3:20.0 mL diluted bleach, 10.0 mL of diluted blue dye, 0mL of distilled water
To calculate the concentration of ClO^- in the 6% bleach solution, we need to consider the molar mass of NaClO and the density of the bleach solution.
Step 1: Calculate the molar mass of NaClO.
The molar mass of NaClO is given by:
Na (22.99 g/mol) + Cl (35.45 g/mol) + O (16.00 g/mol) = 74.44 g/mol.
Step 2: Calculate the mass of NaClO in the 6% bleach solution.
In a 6% bleach solution, the mass of NaClO per 100 grams of bleach is 6 grams. So, the mass of NaClO in the solution can be calculated as follows:
Mass of NaClO = 6% x 100 g = 6 g.
Step 3: Calculate the volume of the 6% bleach solution.
To calculate the volume, we can use the density of the bleach solution, which is given as 1.07 g/mL. Since the density is in grams per milliliter, to convert to grams per liter, we multiply it by 1000:
Density = 1.07 g/mL x 1000 mL/L = 1070 g/L.
Step 4: Calculate the volume of the bleach solution containing 6 grams of NaClO.
The volume of the bleach solution can be calculated using the mass of NaClO and the density of the bleach solution:
Volume = Mass of NaClO / Density = 6 g / 1070 g/L = 0.00561 L.
Step 5: Calculate the concentration of ClO^-.
To calculate the concentration of ClO^-, we need to convert the volume of the solution to liters and divide the mass of NaClO by the molar mass of NaClO:
Concentration = (Mass of NaClO / Molar mass of NaClO) / Volume of solution in liters
= (6 g / 74.44 g/mol) / 0.00561 L = 18.07 mol/L
Therefore, the concentration of ClO^- in the 6% bleach solution is approximately 18.07 mol/L.
To calculate the concentration of ClO^- in a 6% bleach solution, you need to determine the number of moles of NaClO in the solution.
1. First, calculate the mass of NaClO in the solution:
Mass of NaClO = (6% bleach solution) x (100 grams bleach)
= 6 grams NaClO
2. Calculate the volume of the bleach solution:
Volume of bleach solution = (Mass of bleach solution) / (Density of bleach solution)
= (100 grams bleach) / (1.07 g/mL)
= 93.46 mL
3. Convert the volume of the bleach solution to liters:
Volume of bleach solution = 93.46 mL = 0.09346 L
4. Calculate the concentration of NaClO in the solution:
Concentration of NaClO = (Mass of NaClO) / (Molar mass of NaClO)
= 6 grams NaClO / 74.44 g/mol
= 0.0806 mol NaClO
5. Since the stoichiometry of the reaction is 1:1 for NaClO and ClO^-, the concentration of ClO^- is the same as the concentration of NaClO.
Therefore, the concentration of [ClO^-] in the 6% bleach solution is 0.0806 mol/L.