Question

RATE OF CHEMICAL WEATHERING
Rate of Weathering


Introduction: In this lab, you will determine how surface area affects the rate at which materials weather.

Materials: 4 Alka-Seltzer tablets, glass of water, timer

Procedure:
1. The 4 Alka-Seltzer tablets will simulate four different sizes of rocks. Create the four sizes by

- leaving one tablet whole

- breaking the second tablet in half (to form two pieces)

- dividing the third tablet into four pieces (it may shatter into more, that's OK)

- crushing the fourth tablet inside a piece of paper to form a powder.

Answer 1

2. Add water to a glass, be ready with timer and drop the whole alka-seltzer tablet into the glass and time how fast it dissolves. Record dissolving time in text box below.

3. Empty glass and add new water. Drop in the halves of alka-seltzer tablet into the glass (both at same time) and time how fast it dissolves. Record dissolving time in text box below.

4. Empty glass and add new water. Drop the alka-seltzer divided into fourths into the glass (all at same time) and time how fast it dissolves. Record dissolving time in text box below.

5. Empty glass and add new water. Drop the crushed alka-seltzer tablet into the glass (all at same time) and time how fast it dissolves. Record dissolving time in text box below.


Answer the following questions in text box below:
1. What is the definition of surface area?

2. What happened to the surface area of the alka-seltzer when the tablet was broken?

3. Which of the four manipulated tablets had the most surface area, which had the least?

4. Can you develop a conclusion from this experiment? As surface area increases, weathering rate __________________________ .

5. What errors or problems did you have conducting this investigation?

Answer 2

@wwhitlock

Answer 3

Did you do the activities?

Answer 4

no i dont have 4 Alka-Seltzer tablets at home tight now and i have to finsh this really fast

Answer 5

*right*