Advertisements
Advertisements
Question
Is the distilled water acidic/basic/neutral? How would you verify it?
Solution
- Distilled water is neutral in nature. To test it, place a tiny amount of distilled water in two test tubes.
- Place blue litmus paper in one test tube and red litmus paper in the other.
- The colour of either blue or red litmus paper does not change, indicating that distilled water is neither acidic nor basic and, hence, neutral.
APPEARS IN
RELATED QUESTIONS
Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
Fill in the blank in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solution are called .......................... indicators.
What colour will universal indicator show if you add it to the following substances?
(a) potassium hydroxide, pH = 12
(b) soda water, pH = 5
(c) sulphuric acid, pH = 2
Fill in the following blank with suitable words:
Acids have a pH...........than 7.
Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
Explain the pH change as the cause of tooth decay. How can tooth decay caused by pH change be prevented?
A farmer has found that the pH of soil in his fields is 4.2. Name any two chemical materials which he can mix with the soil to adjust its pH.
Which of the following elements would from oxides which would indicate pH values less than seven, using moist pH paper?
Magnesium, Carbon, Sulphur, Hydrogen, Copper
What damage could be caused while the pH is low?
