In the lake, fish tend to inhabit deeper waters during the warmer periods of the day. Which explanation most accurately correlates this behavior with the solubility of gases?
The explanation that most accurately correlates this behavior with the solubility of gases is that the solubility of gases decreases with increasing temperature. As the water temperature rises during warmer periods of the day, the solubility of gases, including oxygen, decreases. In deeper waters, there is typically less sunlight penetration and therefore less photosynthesis occurring, leading to lower oxygen production. Fish, being dependent on dissolved oxygen in the water for respiration, tend to move to deeper waters where oxygen concentrations are higher during warmer periods to meet their oxygen demand.
In the lake, fish tend to inhabit deeper waters during the warmer periods of the day. Which explanation most accurately correlates this behavior with the solubility of gases?(1 point)
Responses
Solubility of gases increases under reduced pressures.
Solubility of gases increases under reduced pressures.
Gases are more soluble at low temperatures.
Gases are more soluble at low temperatures.
Gases are more soluble at high temperatures.
Gases are more soluble at high temperatures.
Solubility of gases increases under elevated pressures.
The explanation that most accurately correlates this behavior with the solubility of gases is that gases are more soluble at low temperatures.
The following table displays four solutions created through the dissolution of salt in water.
Among the provided solutions, which one exhibits the greatest concentration of salt
Without the specific concentrations of salt in each solution, it is not possible to determine which solution exhibits the greatest concentration of salt. The concentration of salt can vary depending on the amount of salt dissolved in a given amount of water. Without this information, it is not possible to determine which solution has the highest concentration of salt.
The following table displays four solutions created through the dissolution of salt in water.
A 5.0 50.0
B 5.0 75.0
C 5.0 100.0
D 5.0 125.0
Among the provided solutions, which one exhibits the greatest concentration of salt
Based on the information provided, the concentration of salt in each solution can be determined by dividing the amount of salt (given in grams) by the amount of water (given in milliliters).
The concentration of salt in solution A is 5.0 g / 50.0 mL = 0.1 g/mL
The concentration of salt in solution B is 5.0 g / 75.0 mL = 0.0667 g/mL
The concentration of salt in solution C is 5.0 g / 100.0 mL = 0.05 g/mL
The concentration of salt in solution D is 5.0 g / 125.0 mL = 0.04 g/mL
Therefore, among the provided solutions, solution A exhibits the greatest concentration of salt with 0.1 g/mL.
Tim conducted experiments with various aqueous solutions to identify the solution displaying the highest conductivity. The diagram illustrates the equipment he employed, while the table enumerates the aqueous solutions subjected to his testing.
Which of the aqueous solutions is most probable to have resulted in the brightest glow of the bulb?
Without the information from the diagram illustrating the equipment used and the table enumerating the aqueous solutions tested, it is not possible to determine which specific solution is most probable to have resulted in the brightest glow of the bulb. The brightness of the bulb's glow depends on the conductivity of the solution, which can vary based on the specific components and concentrations of the solutions tested.
Tim conducted experiments with various aqueous solutions to identify the solution displaying the highest conductivity. The diagram illustrates the equipment he employed, while the table enumerates the aqueous solutions subjected to his testing.
--Bulb
--Electrodes
--Aqueous solution
--Source of power
Which of the aqueous solutions is most probable to have resulted in the brightest glow of the bulb?
KCl(aq) because it is a strong electrolyte
KCl( aq ) because it is a strong electrolyte
CH3OH(aq) because it is an electrolyte
CH 3 OH( aq ) because it is an electrolyte
C12H22O11(aq) because it is a nonelectrolyte
C 12 H 22 O 11 ( aq ) because it is a nonelectrolyte
NH3(aq) because it is a weak electrolyte
The most probable answer is KCl(aq) because it is a strong electrolyte. Strong electrolytes dissociate completely into ions when dissolved in water, resulting in a high concentration of ions in the solution. This high concentration of ions allows for a greater conductivity and produces a brighter glow in the bulb.
A student arranges an investigation to examine the variables influencing the solubility of sodium chloride. The student introduces 5.0g of sodium chloride into four separate beakers, each holding 250 mL of water. Next, the student positions the beakers on distinct hot plates and elevates their temperatures to the subsequent levels:
Beaker A: 30°C
Beaker B: 40°C
Beaker C: 50°C
Beaker D: 60°C
In which of the beakers would the dissolution of sodium chloride occur most rapidly?
(1 point)
Responses
Beaker C
Beaker C
Beaker D
Beaker D
Beaker B
Beaker B
Beaker A
In this case, the dissolution of sodium chloride would occur most rapidly in Beaker D, which is at 60°C. As temperature increases, the solubility of most solid solutes, including sodium chloride, also increases. Therefore, the higher temperature of Beaker D would allow the sodium chloride to dissolve more rapidly compared to the other beakers at lower temperatures.
Two sets of students engaged in a competition to determine which group could achieve the fastest dissolution of 5 grams of salt in 50 mL of water. The table illustrates the techniques they employed.
Which group is presumed to have achieved a quicker dissolution of the salt?
(1 point)
Responses
group X because they used a cup to add the salt
group X because they used a cup to add the salt
group Y because they stirred the water vigorously
group Y because they stirred the water vigorously
group Y because they used a wristwatch to record time
group Y because they used a wristwatch to record time
group X because they used a larger cylinder
The group that is presumed to have achieved a quicker dissolution of the salt is group Y because they stirred the water vigorously. Stirring the water helps in increasing the contact between the salt particles and water molecules, enhancing the rate of dissolution. This agitation aids in breaking down the salt particles and allowing them to disperse more effectively in the water, leading to a faster dissolution process.
Emily opted to perform a trial to ascertain if stirring impacts the speed at which an antacid dissolves. Her hypothesis posited that increasing the speed of stirring would lead to a decreased duration for the antacid to dissolve.
X 300 25 No Stirring 220
Y 300 25 Slow Stirring 80
Z 300 25 Fast Stirring 45
Based on her data, what can we conclude?
(1 point)
Responses
The data does not support the hypothesis.
The data does not support the hypothesis.
The data supports the hypothesis.
The data supports the hypothesis.
The data is biased.
The data is biased.
The data has no relationship to the hypothesis.
Based on the data provided, we can conclude that the data supports the hypothesis. Emily's hypothesis stated that increasing the speed of stirring would lead to a decreased duration for the antacid to dissolve. The data shows that as the speed of stirring increases from no stirring (220 seconds) to slow stirring (80 seconds) to fast stirring (45 seconds), the duration for the antacid to dissolve indeed decreases. This aligns with Emily's hypothesis, indicating that the data supports the hypothesis.
Instructions: Utilize the solubility graphs provided for typical potassium and sodium salts below, along with your comprehension of chemistry, to respond to the question.
Using the data from the graph, which of these solutions can be identified as saturated?
(1 point)
Responses
40 grams of KCl dissolved in 100 grams of water at 43°C
40 grams of KCl dissolved in 100 grams of water at 43°C
70 grams of NaNO3 dissolved in 100 grams of water at 0°C
70 grams of NaNO 3 dissolved in 100 grams of water at 0°C
70 grams of KNO3 dissolved in 100 grams of water at 50°C
70 grams of KNO 3 dissolved in 100 grams of water at 50°C
40 grams of NaCl dissolved in 100 grams of water at 50°C
To determine which of these solutions can be identified as saturated, we need to compare the amount of solute dissolved to the solubility at the given temperature.
According to the solubility graph for typical potassium salts, the maximum solubility of KCl at 43°C is approximately 35 grams per 100 grams of water. Since 40 grams of KCl is dissolved in 100 grams of water at 43°C, it exceeds the solubility limit and the solution is therefore supersaturated, not saturated.
According to the solubility graph for typical sodium salts, the maximum solubility of NaNO3 at 0°C is approximately 100 grams per 100 grams of water. Since 70 grams of NaNO3 is dissolved in 100 grams of water at 0°C, it is below the solubility limit and the solution is not saturated.
According to the solubility graph for typical potassium salts, the maximum solubility of KNO3 at 50°C is approximately 60 grams per 100 grams of water. Since 70 grams of KNO3 is dissolved in 100 grams of water at 50°C, it exceeds the solubility limit and the solution is supersaturated, not saturated.
According to the solubility graph for typical sodium salts, the maximum solubility of NaCl at 50°C is approximately 40 grams per 100 grams of water. Since 40 grams of NaCl is dissolved in 100 grams of water at 50°C, it reaches the solubility limit and the solution can be identified as saturated.
Therefore, the solution that can be identified as saturated is 40 grams of NaCl dissolved in 100 grams of water at 50°C.
A solubility chart is shown below.
What is the maximum amount of KNO3 that can be dissolved in 100 cm3 of water at a temperature of 35°C?
(1 point)
Responses
55 g
55 g
50 g
50 g
45 g
45 g
60 g
To determine the maximum amount of KNO3 that can be dissolved in 100 cm3 of water at a temperature of 35°C, we need to refer to the solubility chart provided. However, the solubility chart mentioned is not displayed, so I cannot provide the exact value from the chart.
Please provide the solubility chart or its relevant values for KNO3 at 35°C, and I will be able to determine the maximum amount of KNO3 that can be dissolved in 100 cm3 of water.