Advertisements
Advertisements
Question
You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
Solution 1
A pH value of less than 7 indicates an acidic solution, while greater than 7 indicates a basic solution. Therefore, the solution with pH = 6 is acidic and has more hydrogen ion concentration than the solution of pH = 8 which is basic.
Solution 2
pH of solutions, A = 6
∴ H+ ion concentration = 10-6 M.
pH of solution B = 8.
∴ H+ ion concentration = 10-8 M.
As 10-6>10-8, hence solution A has more H+ ion concentration.
A solution with pH < 7 is acidic. Hence, solution A is acidic.
A solution with pH > 7 is basic. Hence, solution B is basic.
APPEARS IN
RELATED QUESTIONS
Do basic solutions also have H+ (aq) ions? If yes, then why are these basic?
A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
Indicator is a substance which shows different colours in acidic and basic solutions.
Fill in the blank in the following sentences:
Onion and vanilla extract are..........................indicators.
What is an indicator? Name three common indicators.
What is the effect of adding sodium hydroxide solution to these olfactory indicators?
The indicators which turn red in acid solution are:
(a) turmeric and litmus
(b) phenolphthalein and methyl orange
(c) litmus and methyl orange
(d) phenolphthalein and litmus
hich is more basic (or more alkaline) : a solution of pH = 8 or a solution of pH = 11?
Fill in the following blank with suitable words:
Alkalis have a pH.............. than 7.
Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
What is a universal indicator? For what purpose is it used?
Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?
Explain how pH change in the lake water can endanger the lives of aquatic animals (like fish). What can be done to lessen the danger to the lives of aquatic animals in the lake?
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.
What effect does the concentration of OH− ions have on the nature of a solution?
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
A student prepares solutions of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since both the solutions are colourless, how will she distinguish between the two?
Name any two synthetic acid-base indicators.
Take some lemon juice in a tumbler and add baking soda slowly. What do you see? What do you infer from this?
