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Report (any type)/Brief report
22/09/2021
is the concentration of a solution expressed as the number of moles of solute per litre of solution.
To get the molarity, you divide the moles of solute by the litres of solution.
##”Molarity” = “moles of solute”https://studydaddy.com/”litres of solution”##
For example, a 0.25 mol/L NaOH solution contains 0.25 mol of sodium hydroxide in every litre of solution.
To calculate the molarity of a solution, you need to know the number of moles of solute and the total volume of the solution.
To calculate molarity:
EXAMPLE:
What is the molarity of a solution prepared by dissolving 15.0 g of NaOH in enough water to make a total of 225 mL of solution?
Solution:
1 mol of NaOH has a mass of 40.00 g, so
##”Moles of NaOH” = 15.0 cancel(“g NaOH”) × “1 mol NaOH”/(40.00 cancel(“g NaOH”)) = “0.375 mol NaOH”##
##”Litres of solution” = 225 cancel(“mL soln”) × “1 L soln”/(1000 cancel(“mL soln”)) = “0.225 L soln”##
##”Molarity” = “moles of solute”https://studydaddy.com/”litres of solution” = “0.375 mol”https://studydaddy.com/”0.225 L” = “1.67 mol/L”##
Some students prefer to use a “molarity triangle”.
It summarizes the molarity formulas as
##”Moles” = “molarity × litres”##
##”Molarity” = “moles”https://studydaddy.com/”litres”##
##”Litres” = “moles”https://studydaddy.com/”molarity”##
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I want to thank your team (Jeff) for finding a new writer when you were unable to reach my existing writer to revise my paper. I appreciate your professionalism and efforts. Thanks
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