Question

Exploring the Gas Laws with Alka Seltzer

What are the assumptions we make when using the apparatus in this lab? (Select all that apply)
A. Percent recovery accounts for all the CO2 lost during water displacement after capping the test tube
B. The pressure and temperature of the room remain constant
C. We make no assumptions in this lab
D. The reaction begins after the test tube is capped, so CO2 is not lost to the atmosphere

Answer 1

In the lab exploring gas laws with Alka Seltzer, the assumptions are that the room's pressure and temperature remain constant, and the reaction starts only after the test tube is capped to prevent CO2 loss.

Step-by-step explanation:

When conducting the Exploring the Gas Laws with Alka Seltzer lab and collecting gas over water, there are certain assumptions made about the experimental setup and conditions. The assumptions include:

• B. The pressure and temperature of the room remain constant, which is essential for accurate measurements and applying the gas laws consistently.
• D. The reaction begins after the test tube is capped, so CO2 is not lost to the atmosphere, assuming that the method of capping the test tube is effective at preventing any gas escape.

Option A is not selected as the assumption because we need to account for any CO2 that may be lost before capping the tube, which can happen in a real-life scenario. Option C is disregarded because experiments invariably depend on certain assumptions to interpret the results accurately.