what happen when dilute sulphuric acid is poured on zinc granules.
a) name the gas evovled. how would you test it?
b) write a general reaction between metal and dil acid?
when dilute sulphuric acid reacts with zinc granules they form zincsulphate and hydrogen.
a. hydrogen is evolved and can be tested by keeping a burning matchstick near the test tube you will hear a pop sound .this show that it is hydrogen as it does not support burning
b. metal + acid = salt + hydrogen
Since zinc is more reactive than hydrogen, it displaces hydrogen from sulphuric acid with the evolution of hydrogen gas. This hydrogen gas burns with a pop sound when a burnt match stick is brought near it.
The general reaction between metal and acid can be shown as:
2M + 2HX → 2MX + H2
@natalina:very good answer.keep it up!