Advertisements
Advertisements
Question
You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Solution
- Put red litmus paper in each test tube, turning as needed. A basic solution is one that converts red litmus into blue. The blue litmus paper created can be used to test the acidic solution.
- Put the blue litmus paper in the remaining two test tubes, one at a time. An acidic solution will cause blue litmus paper to turn red.
- Distilled water is the solution that does not affect litmus paper and is considered neutral.
APPEARS IN
RELATED QUESTIONS
Choose the correct answer from the options given below
To increase the pH value of a neutral solution, we should add:
1) an acid
2) an acid salt
3) an alkali
4) a salt
Complete the table:
| Indicator | Neutral | Acidic | Alkaline |
| Litmus | Purple | ______ | ______ |
| Phenolphthalein | Colourless | ______ | ______ |
what are the acidic range and the alkaline range in the Ph scale?
Two solutions A and B have pH values of 2 and 9 respectively which one of these two will give a pink colour with phenolphthalein indicator?
A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of (a) a solution of A (b) a solution of B.
State the inference drawn from the following observation:
pH of liquid R is 10. What kind of substance is R?
What do you understand by pH value?
Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.
Which solution is a strong acid?
Describe the tests used to determine acids and bases.
The indicator that changes to pink colour in an alkaline solution is ______.
