BACE Percentage Solutions
Presentation
•
Science
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9th - 12th Grade
•
Practice Problem
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Medium
+3
Standards-aligned
Summer Smith
Used 7+ times
FREE Resource
4 Slides • 6 Questions
1
BACE Prep
2
Using solid or powdered solutes, you can create solutions based on relative masses.
E.g. 25% NaCl = 25g NaCl in 100g of solution.
If water is your solvent, you can assume it weighs 75g here, so you'd need 75mL of water.
wt/wt solutions
3
Using pure liquid solutes, you can create solutions based on relative volumes.
E.g. 10% ethanol solution = 10mL pure ethanol dissolved in 90mL pure water.
vol/vol solutions
4
Math Response
How many mL of acetone is needed to create 100mL of a 60% (vol/vol) solution?
5
Math Response
How many mL of acetone is needed to create 1L of a 5% (vol/vol) solution?
6
Math Response
How many mL of acetone is needed to create 2.5L of a 5% (vol/vol) solution?
7
Grams of solute per 100mL water.
(Assumes water, which is 1g/mL.)
E.g. 10% glucose solution has 10g glucose dissolved in 100mL water.
wt/vol solutions
8
Math Response
A 10% (wt/vol) solution of glycine (MW 75 Da) is prepared. How many grams of glycine are required to make 100mL of this solution?
9
Math Response
A 10% (wt/vol) solution of glycine (MW 75 Da) is prepared. How many grams of glycine are required to make 1 liter of this solution?
10
Math Response
1 liter of a 10% (wt/vol) solution of glycine (MW 75 Da) is prepared. What is the molarity of this solution? (Use 2 decimal places.)
BACE Prep
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