L4.PH

OBJECTIVES:
1. Knowing view the pH
2. Measure different acideces

MATERIAL:

• Distilled Water 

• Lemon 

• Test tubs 

• ph measure

PROCEDURES:

We cut the lemon in half. We squeeze the two pieces to get juice.Take the pipette. When we have the tubes with all quantities mixed, add the paper measuring the pH to see which number has each mixture. 

RESULTS:

Test tubs	H2O (mL)	LEMON (mL)	PH
1	5	1	3
2	4	2	3
3	3	3	3
4	0	6	3

QUESTIONS:
1. Which is the dependent variable? The pH
2. Which is the independent variable? The lemon
3. Which is the control?

4. Which pH do you think are in blood? And gastric juice? The blood problably is 7 pH because is neutral, and gastric juice is 1 because we have all the acid here.