A solution contains 245 millimoles of potassium bromide in 100. mL of solution. (1) What is...
A solution contains 245 millimoles of
potassium bromide in 100. mL of
solution.
(1) What is the molarity of the solution? M
(2) What volume of this solution would contain
39.8 millimoles of
KBr? mL
Homework Answers
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A solution contains 245 millimoles of
potassium bromide in 100. mL of
solution.
(1) What is...
19. a. What mass of potassium bromide is needed to prepare a 250. mL of a...
19. a. What mass of potassium bromide is needed to prepare a 250. mL of a 2.00 M KBr aqueous solution? Molar mass of KBr = 119.00 g/mol. Use dimensional analysis to calculate the mass. b. Describe the full process of how you would prepare this solution in a 250. mL volumetric flask. c. Calculate the concentration of the solution in question a. if more water was added to bring the solution to a final volume of 1000. mL. (Hint:...
Suppose 0.112 g of zinc bromide is dissolved in 100. mL. of a 27.0 mM aqueous solution of potassium carbonate
Suppose 0.112 g of zinc bromide is dissolved in 100. mL. of a 27.0 mM aqueous solution of potassium carbonate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the zinc bromide is dissolved in it. Be sure your answer has the correct number of significant digits.
Suppose 25.0g of potassium bromide is dissolved in 300.mL of a 0.70 M aqueous solution of...
Suppose 25.0g of potassium bromide is dissolved in 300.mL of a 0.70 M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the potassium bromide is dissolved in it. Round your answer to 3 significant digits.
1) In the laboratory a student combines 35.3 mL of a 0.376 M potassium bromide solution...
1) In the laboratory a student combines 35.3 mL of a 0.376 M potassium bromide solution with 26.6 mL of a 0.595 M potassium sulfate solution. What is the final concentration of potassium cation ? M 2) In the laboratory a student combines 43.3 mL of a 0.438 M iron(III) bromide solution with 21.7 mL of a 0.303 M aluminum bromide solution. What is the final concentration of bromide anion ? M 3)In the laboratory a student combines 20.0 mL...
A chemist prepares a solution of potassium bromide (KBr) by measuring out 0.50 g of KBr...
A chemist prepares a solution of potassium bromide (KBr) by measuring out 0.50 g of KBr into a 250. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 2 significant digits. mol x s ?
1) Suppose .104 g of zinc bromide is dissolved in 100 mL of a 15.0 mM...
1) Suppose .104 g of zinc bromide is dissolved in 100 mL of a 15.0 mM aqueous solution of potassium carbonate. Calculate the final molarity of bromide anion in the solution. you can assume the volume of the solution doesnt change when zinc bromide is dissolved in it. 2) An analytical chemist weights out .113 g of an unknown monoprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution...
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that...
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that is 2.0%w/v? Do NOT include any units, just answer with the NUMBER of grams, for example: 4.2 or 13 or 220. Type your response What is the new concentration, if solvent is added to 20.0 mL of a solution that is 4.0%w/v, until the total volume of the solution is 100.0 mL? (DO NOT include any units with your answer.) Type your response 25...
A beaker contains 0.50 moles of potassium bromide dissolved to a total volume of 600.0 mL....
A beaker contains 0.50 moles of potassium bromide dissolved to a total volume of 600.0 mL. How many moles of potassium bromide are in the beaker if 600.0 mL of water is added to the flask?
how much potassium bromide would you need to dissolve in 100. mL of water to prepare...
how much potassium bromide would you need to dissolve in 100. mL of water to prepare a 35 M solution?
EXERCISE 13 INSTRUCTOR Solution Concentrations Show calculation setups and answers for all problems. 1. What will...
EXERCISE 13 INSTRUCTOR Solution Concentrations Show calculation setups and answers for all problems. 1. What will be the percent composition by mass of a solution made by dissolving 15.0 g of barium nitrate, Ba(NO), in 45.0 g of water? Ba(NO3)2 HO 2. How many moles of potassium hydroxide, KOH, are required to prepare 2.00 L of 0.250 M solution? 3. What is the molarity of a solution that contains 3.50 g of sodium hydroxide, NaOH in 150. mL of solution?...
19. a. What mass of potassium bromide is needed to prepare a 250. mL of a 2.00 M KBr aqueous solution? Molar mass of KBr = 119.00 g/mol. Use dimensional analysis to calculate the mass. b. Describe the full process of how you would prepare this solution in a 250. mL volumetric flask. c. Calculate the concentration of the solution in question a. if more water was added to bring the solution to a final volume of 1000. mL. (Hint:...
A chemist prepares a solution of potassium bromide (KBr) by measuring out 0.50 g of KBr into a 250. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 2 significant digits. mol x s ?
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that is 2.0%w/v? Do NOT include any units, just answer with the NUMBER of grams, for example: 4.2 or 13 or 220. Type your response What is the new concentration, if solvent is added to 20.0 mL of a solution that is 4.0%w/v, until the total volume of the solution is 100.0 mL? (DO NOT include any units with your answer.) Type your response 25...
EXERCISE 13 INSTRUCTOR Solution Concentrations Show calculation setups and answers for all problems. 1. What will be the percent composition by mass of a solution made by dissolving 15.0 g of barium nitrate, Ba(NO), in 45.0 g of water? Ba(NO3)2 HO 2. How many moles of potassium hydroxide, KOH, are required to prepare 2.00 L of 0.250 M solution? 3. What is the molarity of a solution that contains 3.50 g of sodium hydroxide, NaOH in 150. mL of solution?...
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