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A student dissolves 5g of solid Na2CO3 to make 250mL of solution. What is the molar concentration of solution?

April 26, 2017Chemistry dissolves Mathematics na2co3 solid student

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A student dissolves 5g of solid Na2CO3 to make 250mL of solution. What is the molar concentration of solution?

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Compute the gram molecular mass of Na2CO3 by adding the atomic weights of all atoms in the Na2CO3 molecule. Compute the number of moles that 5g represents (5g/MW) Divide the number of moles by the number of Liters (moles/0.250L). The answer is the concentration of Na2CO3 in moles per liter.