Red cabbage contains a water-soluble pigment. In a highly acidic solution, the pigment turns bright red, and in a moderately acidic solution, it turns pinkish. In a highly basic solution, the pigment turns yellow, and in a moderately basic solution, it turns bluish.
A student makes a pH indicator from red cabbage that has a reddish-purple color with a pH of approximately 7. The student pours the same amount of the cabbage solution into each of four different beakers. He then adds a different household solution to each of the four beakers until a color change is obtained. His results are shown in the table below.
The student finds the following chart online from someone else’s cabbage pH indicator investigation.
Based on the information in the passage, which household solution has the highest pH?
a
drain cleaner
b
lemon juice
c
window cleaner
d
club soda
1 answer
The household solution with the highest pH would be drain cleaner.
1 answer