Interpreting and Predicting
Acid-Base Indicators
Name ___________________________
Date ___________________________
Chemistry Practice Sheet
Use the following data charts to answer the questions below.
Solutions and Their Effects on Litmus Paper
Solution
Effect on Blue
Litmus Paper
Effect on Red
Litmus Paper
1
None
Turns Blue
2
None
None
3
Turns Red
None
4
None
Turns Blue
5
Turns Red
None
Predict the results of each solution if phenolphthalein were tested alongside the litmus paper.
Solution 1-
Solution 2-
Solution 3-
Solution 4-
Solution 5-
Complete the chart below by predicting the outcomes for each test on the sample substance.
Various Unknowns and Their Results on Indicators
Sample Substance
Red Litmus
Blue Litmus
Phenolphthalein
Sour Candy
Pool Water with a high pH level
Ca(OH)2
Spinach Juice
Drops of dihydrogen monoxide
H3PO4
Orange Juice
Bleach
Based on the results listed in the chart below, determine the possible pH range and taste of the substance.
The pH range may be 1-3, 3-6, 7, 8-11, or 11-14
Substances and their Multiple Indicators
Sample
Litmus Paper
Phenolphthalein
1
Bright Red
Colorless
2
Bright Blue
Bright Pink
3
Pale Blue
Light Pink
4
No Color Change
Colorless
5
Pale Red
Colorless
pH Range
Taste