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A SOLUTION CONTAINS 1 GRAM OF SODIUM HYDROXIDE IN 250CM^3 OF SOLUTION.CALCULATE THE CONCENTRATION OF THE SOLUTION IN MOLDM^-3?
In Chemistry 2 Answers Available Asked by mercy adeyanju on 4th July, 2020 Ask Your Own Question See More Chemistry QuestionsTry the new Google Books Check out the new look and enjoy easier access to your favorite features Dhafi Quiz Find Answers To Your Multiple Choice Questions (MCQ) Easily at Belajar.dhafi.link. with Accurate Answer. >> This is a List of Available Answers Options :
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A SOLUTION CONTAINS 1 GRAM OF SODIUM HYDROXIDE IN 250CM^3 OF SOLUTION.CALCULATE THE CONCENTRATION OF THE SOLUTION IN MOLDM^-3?
In Chemistry 2 Answers Available Asked by mercy adeyanju on 4th July, 2020 Ask Your Own Question See More Chemistry Questions
Now the #"moles of solute"# are a constant. The volume of solution MAY change substantially with increasing or decreasing temperature. In some calculations #"molality"# is used in preference, which is defined by the quotient.... #"molality"="moles of solute"/"kilograms of solvent"# ....this is temperature independent, and at lower concentrations, #"molarity"-="molality"#.
To get the molarity, you divide the moles of solute by the litres of solution. #"Molarity" = "moles of solute"/"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"/"litres of solution" = "0.375 mol"/"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"/"litres"# #"Litres" = "moles"/"molarity"#
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What is the concentration of a solution containing 1.0 g of sodium hydroxide?
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