title: soft-drink recipes purpose: to gain experience with the concept of concentration q? what is...
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Title: Soft-Drink Recipes
Purpose: To gain experience with the concept of concentration
Q? What is concentration?
Date:
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ConcentrationInvestigation 3
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Part 1- Changing the Solute
Q? What happens to the concentration a solution when you increase the solute (the solid material)?
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Soft Drink Recipes
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What do you think?
Is the soft drink a mixture? Yes, when you put 2 or more things together they are a
mixture. Is the soft drink a solution? Yes, the solute (solid aka kool-aid) dissolved in the water
so it is a solution How could we test this to determine if our soft-drink is a
solution? You could use a filter.
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Let’s make some observations
Let’s have a sample of each soft-drink
In table groups you will be called up to get sample 1 and 2.
Please wait to taste until given directions to.
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What do you think?
Which soft-drink solution tasted sweeter?
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Part- 2 Changing the amount of Solvent
Q? What happens to the concentration of a solution when you decrease the amount of solvent in the solution?
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Soft-Drink Solutions A and B
Should be in notebook
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Which soft-drink would you recommend?
Should be in notebook
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LOL
WORD BANK:
Concentration- is the amount of material dissolved in a measure of a liquid.
To dilute is to make a solution less concentrated, usually by adding more liquid (solvent).
Volume is the three-dimensional space occupied by something. In this investigation it is the amount of liquid.
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LOL cont.
Content:
What happens to the soft-drink solution when you increase the amount of powder in a given amount of water?
As the amount of solute (the kool-aid) in a solution is increased, the concentration goes up.
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Concentration
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Title: Salt Concentration
Purpose: To investigate the concentration of Salt solutions.
Date:
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Q? Which salt solution is more concentrated?
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How can we determine which salt solution is more concentrated?
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Observations
Should be in notebook
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Volume
What happened to the volume of our saturated Kool-Aid solutions in the bottles?
The volume increased
What happened when we made solution 2 with three spoons of salt?
The volume increased
When you use a balance to compare concentrations of solutions, you must compare equal volumes.
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Should be in notebook
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Concentration
If you compare equal volumes of two solutions on a balance, and one is heavier that the other, the heavier one is more concentrated
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Part 3 & 4
Solution 2
Solution 3 had more water so it was diluted.
Solution 3
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LOL
How can you determine relative concentrations of solutions?
When equal volumes of two solutions are compared on a balance, the heavier one is more concentrated.