20.0mls of a bulk solution was transferred to a 100ml volumetric flask and diluted to volume with water. 2.00mls of this solution was then found to have a concentration of 0.15M. What is the concentration of the bulk solution.
McVc=MdVd
(Mc)(.02L)=.15M(.002L)
Mc= .015M concentration of bulk solution
well since its a solution, don't all the particles mix? in which case every sample, will have a concentration of .15?
sorry if im wrong i barely passed basic chem, i suck.
20.0mls of a bulk solution was transferred to a 100ml volumetric flask and diluted to volume with water. 2.00mls of this solution was then found to have a concentration of 0.15M/l. What is the concentration of the bulk solution.
The bulk solution has been diluted from 20 ml to 100 ml, namely 5 times.
The diluted solution was found to have a concentration of 0.15 M/l. Thus the bulk solution has a concentration 5 times higher, namely 0.75 M/l.
To find the concentration of the bulk solution, we can use the formula McVc = MdVd, where Mc is the concentration of the bulk solution, Vc is the volume of the bulk solution, Md is the concentration of the diluted solution, and Vd is the volume of the diluted solution.
Given information:
Vc (volume of bulk solution) = 100 mL = 0.1 L (converted from milliliters to liters)
Md (concentration of diluted solution) = 0.15 M
Vd (volume of diluted solution) = 2.00 mL = 0.002 L (converted from milliliters to liters)
Substituting the values into the formula, we get:
(Mc)(0.1 L) = (0.15 M)(0.002 L)
To isolate Mc (concentration of the bulk solution), divide both sides of the equation by 0.1 L:
Mc = (0.15 M)(0.002 L) / (0.1 L)
Simplifying the expression, we get:
Mc = 0.015 M
Therefore, the concentration of the bulk solution is 0.015 M.