Question

Can someone help me? ill fan and give medal.

Answer 1

A group of students do an activity with baking soda and vinegar.
The steps of the activity are listed below:
1. Pour 100 g vinegar into a flask.
2. Measure the temperature of the vinegar.
3. Add 10 g of baking soda to the flask.
4. Observe as the contents of the flask fizz (produce bubbles).
5. Measure the temperature of the contents in the flask and observe any change in temperature.

Answer each question in AT LEAST 2 OR MORE complete sentences for each question below. Make sure you use complete sentences and use your rubric to guide you.

a. Describe one piece of evidence that a chemical reaction occurs when baking soda is added to vinegar. (2 sentences required)
b. What should the total mass of all the products of the reaction be? Show your calculations or explain your answer, and include units in your answer. (2 sentences required)

After the fizzing stops, the students determine that the liquid in the flask has a mass of 105 g. The students thought something was wrong.
c. Explain what property or law made the students realize their experiment was incorrect. (2 sentences required)
d. How could the students change their experiment to make it more accurate? Describe how the change the activity so that the total mass of all the products is the value you calculated in part (b). Explain your reasoning. (2 sentences required)