How do metals react with acids?

Metals all have similar physical properties.They are shiny.They conduct heat and electricity.Metals have patterns in their chemical properties too.

 

Some metals react with hydrochloric acid. The products are a salt and hydrogen gas. Iron reacts more vigorously than lead and less vigorously than magnesium. Some metals, for example, silver does not react with hydrochloric acid.

 

Ex. Zinc + hydrochloric acid → Zinc Chloride+ hydrogen

 

How do you test for hydrogen?

A reaction in a test tube makes bubbles. How can you tell if the bubbles contain hydrogen gas?

 

1. Collect the gas by holding an empty test tube above the reaction test tube.

 

2. Light a splint

 

3.Hold the splint in the test tube that now contains gas

 

4.Listen, if the splint goes out with a squeaky pop, the gas is hydrogen.

 

The squeaky pop happens because hydrogen and oxygen react explosively.The product is water.

Hydrogen + oxygen → water

 

Do all metals react with dilute acids?

Some metals do not react with dilute acids. Nothing happens if you add gold, silver or copper to dilute hydrochloric acid.