Activity 3.11 NCERT Class 10 Science, Metals and Non-metals

Activity 3.11 NCERT Class 10 Science, Chapter 3 Metals and Non-metals

Brief procedure:

Activity 3.11 asks us to react to various metals with dilute hydrochloric acid and observe the reaction.

Observation: 

Metals react with dilute hydrochloric acid and form metal chlorides with the evolution of hydrogen gas.

Metal(s) +  HCl(aq) ———–> Metal Chloride(aq) + H₂(g)

E.g.

Ca(s) + 2HCl(aq) ————-> CaCl₂(aq) + H₂(g)

Order of reactivity:

Ca>Mg>Al>Zn>Fe>Pb>Cu

Temperature during the reaction: 

Experiment done at room temperature (25˚C).

Calcium: 40˚C

Zinc: 34˚C

Iron: 30˚C

Copper: 25˚C

Inference/conclusion:

Metals react with acids to form their salt. The process is exothermic and hydrogen gas is also produced.

Next: Reaction of metal with salt, Activity 3.12.

See also: Reaction of metals with water, Activity 3.10.