Reaction Rate Lab of Alka-seltzer

The experimental question for our lab is stated as ______.

• Does the exposed area of the tablet affect the time of reaction?

• Does the temperature of water affect the reaction time of alka-seltzer?

• How does surface area of Alka-seltzer affect the temperature of water?

• How does the height of the beaker affect the temperature of water?

After stating the problem, you should do this next.

• Formulate a hypothesis

• Do the experiment

• Analyze your result

• Make a conclusion

In the experiment, what did you manipulate as your independent variable?

• outside surface of tablet exposed to water

• the time when the bubbles appear and disappear

• the amount of water in the beaker

• the temperature of the water

How did you measure the mass of the alka-seltzer?

• Use the triple beam balance

• Use the beaker

• Use the thermometer

• Use a mortar and pestle

To make the tablet into powder form, the _______ is used.

• 
• 
• 
• 

The control group of the Alka-seltzer reaction lab is the ______.

• whole tablet

• 16 pieces of tablet

• crushed or powder tablet

The experimental group of the Alka-seltzer lab is the ______. Choose two answers.

• whole tablet

• 16 pieces

• powdered or crushed tablet

To measure the mass of the tablet we use the ____.

• triple beam balance

• graduated cylinder

• beaker

• thermometer

To get a better result, we must do the following _______. Choose all that apply.

• Keep the constant variables the same.

• Follow the instruction.

• Practice accuracy and precision

• Make more trials of the experiment

The result of measuring the mass of Alka-seltzer is 2.6 grams, 2.5 grams and 2.7 grams. What is the average mass of the tablet?

• 2.6 grams

• 2.5 grams

• 2.7 grams

• cannot be known