The scene that best represents the resulting mixture is to be identified. Concept introduction: Precipitation reaction involves the reaction of two soluble ionic compounds to form an insoluble product. The insoluble product is known as precipitate. The reason for the precipitation reaction to occur is the formation of product that is insoluble in nature. Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water.
The scene that best represents the resulting mixture is to be identified. Concept introduction: Precipitation reaction involves the reaction of two soluble ionic compounds to form an insoluble product. The insoluble product is known as precipitate. The reason for the precipitation reaction to occur is the formation of product that is insoluble in nature. Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water.
The scene that best represents the resulting mixture is to be identified.
Concept introduction:
Precipitation reaction involves the reaction of two soluble ionic compounds to form an insoluble product. The insoluble product is known as precipitate.
The reason for the precipitation reaction to occur is the formation of product that is insoluble in nature.
Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water.
(b)
Interpretation Introduction
Interpretation:
The total concentration of dissolved (separated) ions is to be calculated.
Concept introduction:
Precipitation reaction involves the reaction of two soluble ionic compounds to form an insoluble product. The insoluble product is known as precipitate.
The reason for the precipitation reaction to occur is the formation of product that is insoluble in nature.
Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water.
(b)
Interpretation Introduction
Interpretation:
The mass of solid is to be calculated.
Concept introduction:
Precipitation reaction involves the reaction of two soluble ionic compounds to form an insoluble product. The insoluble product is known as precipitate.
The reason for the precipitation reaction to occur is the formation of product that is insoluble in nature.
Ionic compounds are the compounds that are composed of charged ions. There are held together by electrostatic forces. These compounds dissociate into ions when dissolved in water.
In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo-
hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number
of significant figures.
B. Freezing Point of Cyclohexane plus
Calculation Zone
Unknown Solute
2. Mass of cyclohexane (g)
10.14
Part C.4
3. Mass of added solute (g)
0.255
C. Calculations
1. k; for cyclohexane (°C⚫ kg/mol)
20.0
2. Freezing point change, AT, (°C)
3.04
Part C.6
3. Mass of cyclohexane in solution (kg)
4. Moles of solute, total (mol)
Show calculation.
5. Mass of solute in solution, total (g)
6. Molar mass of solute (g/mol)
Show calculation.
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