Metal Reactions

This week we were did three experiments using metal. The first one was metal reacting with acid. Then magnesium reacting with oxygen. Lastly we were testing for the presence of oxygen.  

Metal and acid

Magnesium + sulfuric acid --> magnesium sulfate + hydrogen.

First we got a test tube and put 2ml of acid in. Then we got a little piece of metal and dropped it in the tube. After that we quickly got a boiling tube and put it over the tube. After 2 minutes of waiting we got a little thing called a splint, set it on fire and put it in the boiling tube then  it made a popping sound.

When you put the metal in the acid it started bubbling and forming hydrogen. After a while it started to accumulate in the top of the boiling tube. When the flame came in contact it made a popping sound because the hydrogen. This showed that there was hydrogen. 

Metals and Oxygen

Magnesium + Oxygen --> Magnesium Oxide. 

First we set up the bunsen burner and got a pair of scissor tongs. After that we grabbed a piece of magnesium and lit the bunsen burner. When we put the magnesium over the flame it started glowing and it was quite bright. After that the magnesium turned into a white powder called magnesium oxide.

Testing for the presence of oxygen

Magnesium Dioxide + Hydrogen Peroxide --> Magnesium Hydroxide + Oxygen.

First we got some test tubes and put some magnesium dioxide into it. After that we lit a splint. Then we put some hydrogen peroxide into the tube. After that they started reacting with each other. Lastly we blew out the splint, put the smouldering splint in the tube and it set on fire again. 

Metal Carbonates and Acids

Metal Carbonate + Acid  --> Metal Salt + Water + Carbon Dioxide

First we grabbed two tubes and put a bung in one with the delivery tube going into the other test tube. Then we added some metal carbonate into the tube with the bung. In the other tube we put some lime water. After we quickly took off the bung, added some acid and put the bung back on. After a few attempts the lime water started going cloudy.