In what pH range did the cabbage extract indicate a pH change by changing color?

ID: 32449 • Letter: I

Question

In what pH range did the cabbage extract indicate a pH change by changing color?

all the pH's tested: from 2.5 to 14

B. the acidic pH's tested: from 2 to 7

C. none of the pH's tested: it stayed blue throughout

D. the basic pH's tested: from 8 to 13

Which is a stronger acid: citric acid or vinegar?

they are equally strong.

Vinegar

Acetone is a stronger acid than both of them

Citric acid

In the phosphate buffer system experiment which solution had the greatest change in pH after the addition of the hydrochloric acid?

1) Sodium dibasic phosphate

2) Water

3) Phosphate mix

4) Sodium monobasic phosphate

which solution had the greatest change in the PH after the addition of the sodium hydroxide base ?

1) Water

2) Phosphate Mix

3)sodium monobasic phosphate

4) sodium dibasic phosphate

which solution had the least change in PH after addition of the acid or the base ?

1) Phosphate mix

2) Water

3) Sodium monobasic phosphate

4) Sodium dibasic phosphate

1. the acidic pH's tested: from 2 to 7
2.they are equally strong. both are weak acid
3. Sodium monobasic phosphate
4.Phosphate Mix
5.Water

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