So for a lab we have to do some pre-calculations, I can usually do them but this time I am stumped.
Stock Concentrations: 0.67M of Bleach, 0.00400M of Dye
We have 1.5 mL of water, 1.0 mL of a Dye, and 0.5 mL of Bleach, and are asked to calculate concentration (M) of Dye and Bleach.
It seems really simple to me but I am just not sure at all how to calculate the concentrations, could anyone help?
Stock Concentrations: 0.67M of Bleach, 0.00400M of Dye
We have 1.5 mL of water, 1.0 mL of a Dye, and 0.5 mL of Bleach, and are asked to calculate concentration (M) of Dye and Bleach.
It seems really simple to me but I am just not sure at all how to calculate the concentrations, could anyone help?
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Since you are using mL of liquids, I will calculate mmoles (millimoles)
millimoles bleach = Molarity x mL bleach = (0.67)(0.5) = 0.34 mmoles bleach
New molarity bleach = mmoles bleach / total volume in mL = 0.34 / 3.0 = 0.11 M
millimoles dye = Molarity dye x mL dye = (0.00400)(1.0) = 0.00400 mmoles dye
New molarity dye = mmoles dye / mL of solution = 0.00400 / 3.0 = 0.0013 M
millimoles bleach = Molarity x mL bleach = (0.67)(0.5) = 0.34 mmoles bleach
New molarity bleach = mmoles bleach / total volume in mL = 0.34 / 3.0 = 0.11 M
millimoles dye = Molarity dye x mL dye = (0.00400)(1.0) = 0.00400 mmoles dye
New molarity dye = mmoles dye / mL of solution = 0.00400 / 3.0 = 0.0013 M