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 diagram and the table listing the aqueous solutions, it is not possible to determine which solution is most probable to have resulted in the brightest glow of the bulb.
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?
(1 point)
Responses
KCl(aq) because it is a strong electrolyte
KCl( aq ) because it is a strong electrolyte
NH3(aq) because it is a weak electrolyte
NH 3 ( aq ) because it is a weak electrolyte
C12H22O11(aq) because it is a nonelectrolyte
C 12 H 22 O 11 ( aq ) because it is a nonelectrolyte
CH3OH(aq) because it is an electrolyte
Based on the given information, KCl(aq) is most likely to have resulted in the brightest glow of the bulb because it is a strong electrolyte.
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?
The dissolution of sodium chloride would occur most rapidly in Beaker D at 60°C. Generally, as the temperature increases, the solubility of most solid solutes also increases. Therefore, the higher the temperature, the faster the sodium chloride will dissolve.
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 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
group X because they used a larger cylinder
group X because they used a cup to add the salt
Based on the information provided, it is most likely that group Y achieved a quicker dissolution of the salt. This is because they stirred the water vigorously, which helps to increase the rate of dissolution by promoting faster mixing and increasing the surface area of the salt particles in contact with the water. Stirring the solution allows for better distribution of the solute particles and increases the speed at which they dissolve.
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.
Based on her data, what can we conclude?
(1 point)
Responses
The data has no relationship to the hypothesis.
The data has no relationship to the hypothesis.
The data is biased.
The data is biased.
The data does not support the hypothesis.
The data does not support the hypothesis.
The data supports the hypothesis.
In order to determine what the data suggests, the actual data needs to be provided. Without the data, it is not possible to conclude whether it supports or does not support the hypothesis.
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 has no relationship to the hypothesis.
The data has no relationship to the hypothesis.
The data is biased.
The data is biased.
The data does not support the hypothesis.
The data does not support the hypothesis.
The data supports the hypothesis.