What’s Cookin LAB 2 Fall 2005
Purpose
1)
To determine the amount of sodium chloride in a typical shake.
2) To try and get both a molecular and
macroscopic understanding of how much sodium is in common foods.
Introduction
Sodium chloride is put in many foods as a flavor enhancer. Table salt is a source of sodium ions into the diet. Today we focus on table salt, particularly the sodium ion.
The role of sodium ions on health has been investigated. (A babble on health) “Too much is a bad thing” appears to be the common wisdom. Your text has information
To understand how much salt is in the diet we will investigate the salt content of a number of foods. Being chemist we will pay attention to moles and such. Eventually we will be noting the amount of sodium in particular foods.
Experimental
You will work in teams. The number of samples of food I obtain will determine the size and number of groups.
Part 1: Note the Morton Salt label I have. Obtain the “daily amount of sodium recommended by this label”. Note the result section for what I want.
Part 2: Obtain a salt shaker and shake some salt onto a piece of paper as if you were seasoning your favorite salt needing food. Repeat this a number of times. Please put some thought and discussion into how exactly you want to do this. Your goal in this part is to calculate how much salt (mass in grams) is there in a shake.
Part 3: Obtain a sample of food. Your team’s
goal will be to understand how much salt is in a serving of your food. You will show us a serving size and then
show us the package and state how many servings there are per package. You then will put a serving in front of us
and state how much salt is in it. Then
you will state how many shakes are needed from your salt shaker to obtain this
amount of salt. You then will
demonstrate this by shaking in front of the class. You then will report on how many normalized shakes it took.
Results
Part 1: From
Morton Salt Label.
Amount of
sodium/serving = __________
grams
Amount of sodium
chloride/serving = __________ mols
Amount of
sodium chloride/serving = __________ grams
Recommended
servings per day = ____________
Part 2: Analysis of Morton Salt Label.
Amount of
sodium/day = __________
grams
Amount of
sodium chloride/day = __________ mols
Amount of
sodium chloride/day = __________ grams
Part 3: The shaking.
Trial 1 Trial 2 Trial
3
Mass of salt/shake: _________ _________ _________
mols of
salt/shake _________ _________ ________
mols of sodium/shake: _________ _________ _________
mass of
sodium/shake _________ _________ ________
Average mass of sodium per
shake: _____________
Average moles of salt per
shake: _____________
Average mass of salt per
shake: _____________
Part 4: The Food analysis.
What was your food? How many grams of salt per serving? How many shakes is this? How many normalized shakes is this?