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Suppose you were preparing 1.0 L of a bleaching solution in a volumetric flask, and it calls for 0.25 mol of NaOCl. If all you had available was a jug of bleach that contained 0.82 M NaOCl, what volume of bleach would you need to add to the volumetric flask before you added enough water to reach the 1.0 L line? Express the volume in milliliters to two significant figures. You need to prepare a 1.60 M solution of potassium bromide (molar mass of potassium bromide = 119.00 g/mol), but you only have a 10 mL graduated cylinder and a 25 mL beaker. Complete the following sentences regarding the concentration of the prepared solution. Choices are: 1.90g, greater than 1.60M, exactly 10.0mL, less than 10.0mL, 0.016g, less than 1.60M, exactly 1.60M, greater than 10.0 mL 1. In order to prepare 10.0 mL (0.0100 L) solution of 1.60 M potassium bromide, a mass of would be required. 2. When the solute and a total of 10.0 mL of water are both added into the beaker and stirred until the solute dissolves, the solution volume will be 3. Based on that, the concentration of the prepared solution will be _ You are asked to prepare a 1.000 L solution of 4.5 M C6H12O6 (glucose; molar mass = 180.16 g/mol) in a lab by dissolving 811.0 g of glucose in water. Consider the following two scenarios in which you commit a user error while preparing this solution. Prepared in a volumetric flask Prepared in a beaker Assumed volume 1.000 L 1.000 L Volumetric error Added water 2.0 cm above the line, which corresponds to 6.3 mL (0.0063 L) additional solution volume 811.0 g takes up 526 mL of space rather than 500 mL of space Preparation details You add the glucose to a volumetric flask and then add water until it dissolves. The water bottle you are using has a worn tip, and you inadvertently add too much water such that the meniscus is above the line. The diameter of the neck of the volumetric flask is 2.29 cm. You prepare the solution by adding glucose to a large beaker and approximated the volume of the glucose to be 500 mL. Therefore, you add 500 mL of water to the 526 mL in the beaker using a graduated cylinder. You decide to evaluate and compare the errors you made while preparing the solutions using the different methods. Calculate the actual concentrations of the intended 4.5 M glucose solutions prepared by each method based on their actual final volumes. You can practice converting between the mass of a solution and mass of solute when the mass percent concentration of a solution is known. The concentration of the KCN solution given in Part A corresponds to a mass percent of 0.415 %. What mass of a 0.415 % KCN solution contains 493 mg of KCN?

Suppose you were preparing 1.0 L of a bleaching solution in a volumetric flask, and it calls for 0.25 mol of NaOCl. If all you had available was a jug of bleach that contained 0.82 M NaOCl, what volume of bleach would you need to add to the volumetric flask before you added enough water to reach the 1.0 L line?
Express the volume in milliliters to two significant figures.

You need to prepare a 1.60 M solution of potassium bromide (molar mass of potassium bromide = 119.00 g/mol), but you only have a 10 mL graduated cylinder and a 25 mL beaker. Complete the following sentences regarding the concentration of the prepared solution. Choices are: 1.90g, greater than 1.60M, exactly 10.0mL, less than 10.0mL, 0.016g, less than 1.60M, exactly 1.60M, greater than 10.0 mL

1. In order to prepare 10.0 mL (0.0100 L) solution of 1.60 M potassium bromide, a mass of ________ would be required.
2. When the solute and a total of 10.0 mL of water are both added into the beaker and stirred until the solute dissolves, the solution volume will be ______
3. Based on that, the concentration of the prepared solution will be _______

You are asked to prepare a 1.000 L solution of 4.5 M C6H12O6 (glucose; molar mass = 180.16 g/mol) in a lab by dissolving 811.0 g of glucose in water. Consider the following two scenarios in which you commit a user error while preparing this solution.
Prepared in a volumetric flask
Prepared in a beaker
Assumed volume
1.000 L
1.000 L
Volumetric error
Added water 2.0 cm above the line, which corresponds to 6.3 mL (0.0063 L) additional solution volume
811.0 g takes up 526 mL of space rather than 500 mL of space
Preparation details
You add the glucose to a volumetric flask and then add water until it dissolves. The water bottle you are using has a worn tip, and you inadvertently add too much water such that the meniscus is above the line. The diameter of the neck of the volumetric flask is 2.29 cm.

You prepare the solution by adding glucose to a large beaker and approximated the volume of the glucose to be 500 mL. Therefore, you add 500 mL of water to the 526 mL in the beaker using a graduated cylinder.

You decide to evaluate and compare the errors you made while preparing the solutions using the different methods. Calculate the actual concentrations of the intended 4.5 M glucose solutions prepared by each method based on their actual final volumes.

You can practice converting between the mass of a solution and mass of solute when the mass percent concentration of a solution is known. The concentration of the KCN solution given in Part A corresponds to a mass percent of 0.415 %.
What mass of a 0.415 % KCN solution contains 493 mg of KCN?

Added by Nuria V.

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