Some cooks will tell you that they salt the water used to boil pasta because adding table salt (NaCl) to the water makes the water boil at a higher temperature, cooking the pasta faster. Assuming that the water needs to boil at least 5 °C hotter to make a measurable difference in the cooking time for the pasta, how much salt would need to be added to 2 L of water? Or, in other words, did these cooks pay close enough attention in their chemistry classes? Give your answer in cups. Hint: 1 teaspoon of NaCl weighs about 6 g, and there are 48 teaspoons per cup.
Some cooks will tell you that they salt the water used to boil pasta because adding table salt (NaCl) to the water makes the water boil at a higher temperature, cooking the pasta faster. Assuming that the water needs to boil at least 5 °C hotter to make a measurable difference in the cooking time for the pasta, how much salt would need to be added to 2 L of water? Or, in other words, did these cooks pay close enough attention in their chemistry classes? Give your answer in cups. Hint: 1 teaspoon of NaCl weighs about 6 g, and there are 48 teaspoons per cup.
Given : Elevation in boiling point of solution required = 5 oC
And volume of water = 2 L = 2000 mL (since 1 L = 1000 mL)
Since density of water = 1.0 g/mL
Hence mass of water = density X volume of water = 1.0 X 2000 = 2000 g = 2 Kg (since 1 Kg = 1000 g)
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