In this experiment, were intentionally manipulated. These were the independent variables. The dependent variable measured was .
color of the reactiontemperature of the reaction✔ time of the reactionamount of gas produced by the reaction
Which observation was a sign that a chemical reaction was occurring in this experiment?
As the temperature of the reaction increases, what happens to the average time for the tablet to dissolve? A shorter time of reaction indicates a rate of reaction.
A shorter time of reaction indicates a rate of reaction.
Based on the data shown in the graph, what would be the most reasonable estimate for the time required for the same reaction at 30°C?
Which form of the sodium bicarbonate tablet has the most surface area? As the surface area increases, what happens to the average time required for the reaction?
As the surface area increases, what happens to the average time required for the reaction?
As the amount of surface area increases, what happens to the rate of this reaction?
If the antacid tablet were broken into eight pieces, what would be a reasonable estimate for the time of reaction?
Why is it important to keep the temperature and the amount of water the same when testing surface area?
The temperature and the amount of water need to be kept the same so that the only variable that changes is surface area. If you allow the temperature and/or the amount of water to change too, you will not know which variable is causing the changes that you observe. Which of the following did you include in your answer?
Which of the following did you include in your answer? Check all that apply.
Which procedures were followed in this lab to decrease experimental error? Check all that apply.
Which glow stick will be brighter once it is bent? Explain your answer.
The glow stick that was in the cup of hot water will be brighter once it is bent. The production of more light is evidence that the chemical reaction in the glow stick is happening faster. The reaction happens faster because increasing the temperature increases the rate of a chemical reaction, leading to more frequent and energetic collisions between molecules.
Which of the following did you include in your answer? Check all that apply.
Cold water and powdered lemonade Cold water and lemonade tabletsWarm water and powdered lemonade Warm water and lemonade tablets
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