To study the effect of dissolved salt on the rusting of an iron sample, a student prepared a...
Question:
To study the effect of dissolved salt on the rusting of an iron sample, a student prepared a solution of NaCl by dissolving 3.922 g of NaCl in enough water to make 781.5 mL of solution. What is the molarity of this solution?
Molarity of Solutions
The molarity of a solution is defined as the number of moles of solute dissolved in one litre of solution. If we know the mass of the solute in grams, we need to first convert it to moles by dividing by the molar mass (which can be computed with the help of a periodic table).
Answer and Explanation: 1
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View this answerOur salt sample has a mass of 3.922 g. What is the molar mass of NaCl? From a periodic table, we compute:
{eq}23 + 35.5 = 58.5 \ g/mol {/eq}.
Hence...
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Calculating Molarity and Molality Concentration
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