Advertisements
Advertisements
Question
You are supplied with five solutions: A, B, C, D and E with pH values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5
Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.
Which solution would be most likely to liberate hydrogen with powdered zinc metal. Give a word equation for each reaction.
Advertisements
Solution
A = Strongly acidic
B = neutral
C = Slightly alkaline
D = Strongly alkaline
E = Slightly acidic
Solution (A) would liberate hydrogen with powdered zinc metal.
\[\ce{Zinc + Acid -> Salt of zinc + Hydrogen}\]
APPEARS IN
RELATED QUESTIONS
Give two examples of organic acids.
What happens to the temperature of the solution when an acid is neutralised?
Which chemical is injected into the skin of a person during the nettle leaf hair sting?
How can the effect of this sting be neutralised?
Water is never added to acid in order to dilute it why?
In acidic solutions blue litmus changes into ______ colour.
Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
| Column (A) |
Column (B) |
| (A) Bleaching powder | (i) Preparation of glass |
| (B) Baking soda | (ii) Production of H2 and Cl2 |
| (C) Washing Soda | (iii) Decolourisation |
| (D) Sodium chloride | (iv) Antacid |
Hydrochloric Acid reacts with metal bicarbonates to give ______.
Which of the following metal does not react with sodium hydroxides?
A metal 'M' on reacting with dilute acid liberates a gas 'G'. The same metal also liberates gas 'G' when reacts with a base.
- Write the name of gas 'G'.
- How will you test the presence of this gas?
- Write chemical equations for the reactions of the metal with (1) an acid and (2) a base.
Explain the following:
H3PO3 is not a tribasic acid.
