Question

QUESTIONS .Dyes have very high molar absorptivity. Why is this an advantage for their use in food products? How do we "blank the spectrophotometer"? Why is it done? How would you make 450.00mL of 2.50M sulfuric acid solution from a stock bottle that is 6.00M? Show calculation and explain how. What is the molarity of the nitrate ion that is found in a solution made by dissolving 6.25g of aluminum nitrate in a total volume of 325.0mL? A 200.00 mL. solution was made by dissolving 0.3525g of a powdered drink. The powdered drink was determined to have a blue dye concentration of $3.28 \times 10^{-4}$ M. If the molar mass of the blue dye was 792.84g/mol, what is the percent blue dye in the drink (solution)? 

          QUESTIONS
.Dyes have very high molar absorptivity. Why is this an advantage for their use in food
products?
How do we "blank the spectrophotometer"? Why is it done?
How would you make 450.00mL of 2.50M sulfuric acid solution from a stock bottle that is
6.00M? Show calculation and explain how.
What is the molarity of the nitrate ion that is found in a solution made by dissolving 6.25g of
aluminum nitrate in a total volume of 325.0mL?
A 200.00 mL. solution was made by dissolving 0.3525g of a powdered drink. The powdered
drink was determined to have a blue dye concentration of $3.28 \times 10^{-4}$ M. If the molar mass of
the blue dye was 792.84g/mol, what is the percent blue dye in the drink (solution)?
Show more…
QUESTIONS .Dyes have very high molar absorptivity. Why is this an advantage for their use in food products? How do we "blank the spectrophotometer"? Why is it done? How would you make 450.00mL of 2.50M sulfuric acid solution from a stock bottle that is 6.00M? Show calculation and explain how. What is the molarity of the nitrate ion that is found in a solution made by dissolving 6.25g of aluminum nitrate in a total volume of 325.0mL? A 200.00 mL. solution was made by dissolving 0.3525g of a powdered drink. The powdered drink was determined to have a blue dye concentration of 3.28 Ă— 10^-4 M. If the molar mass of the blue dye was 792.84g/mol, what is the percent blue dye in the drink (solution)?

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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Please assist. Thank you! 6.00M? Show calculation and explain how. products? QUESTIONS aluminum nitrate in a total volume of 325.0mL.? What is the molarity of the nitrate ion that is found in a solution made by dissolving 6.25g of
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Transcript

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00:01 Hi, so to solve for this we will use the formula for molarity.
00:05 Molarity is equivalent to the number of moles of the solute over the volume of the solution in terms of liters.
00:14 So the first question is the molarity of the solution.
00:19 So aluminum nitrate solution that's alno3.
00:25 If we have 24 .9 grams of alno3, convert this to moles by dividing the mass of this compound that will be 213 grams and then we have here moles over the volume of the solution we have 500 ml.
00:46 We have to convert ml to liters.
00:48 1000 ml is 1 liter.
00:51 So that means you could cancel grams of aluminum nitrate ml ml and then we have here the remaining units.
00:56 We have moles per liter.
00:59 Solving for this one, this will give us 0 .234.
01:04 This is moles of aluminum nitrate per liter solution or molar.
01:13 That's the answer to the first question.
01:15 The second question is concentration of the aluminum cation...
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