Whether a solute that has solubility in water of 21 g/kg water is the same as 21 g/kg solution is to be determined. Concept introduction: The solution is a homogenous mixture that is formed from two or more substances. It consists of two components, solute, and solvent. The substance that is present in a smaller amount and is dissolved in the other substance is called solute. The solvent is that substance which is present in a larger amount and it dissolves solute in itself.

Question

Propagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.

Answer 1

Question

Chapter 13, Problem 13.53P

Interpretation Introduction

Interpretation:

Whether a solute that has solubility in water of 21 g/kg water is the same as 21 g/kg solution is to be determined.

Concept introduction:

The solution is a homogenous mixture that is formed from two or more substances. It consists of two components, solute, and solvent. The substance that is present in a smaller amount and is dissolved in the other substance is called solute. The solvent is that substance which is present in a larger amount and it dissolves solute in itself.

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Propagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.

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