Get premium membership and access questions with answers, video lessons as well as revision papers.

In an experiment, a piece of magnesium ribbon was cleaned with steel wool. 2.4 g of the clean magnesium ribbon was placed in a crucible and completely burnt in oxygen

      

In an experiment, a piece of magnesium ribbon was cleaned with steel wool. 2.4 g of the clean magnesium ribbon was placed in a crucible and completely burnt in oxygen. After cooling, the product weighed 4.0 g
a) Explain why it was necessary to clean the magnesium ribbon
b) What observation was made in the magnesium ribbon
c) Why was there an increase in mass

  

Answers


John
a) To remove any oxide film on it

b) A white solid formed which is magnesium oxide

c) The increase in mass was due to the oxygen which combines with magnesium
johnmulu answered the question on February 2, 2017 at 07:04


Next: When wood is burnt, a grey powder called ash remains. The ash is stirred with water and filtered a colourless solution is obtained
Previous: A candle wax is mainly a compound consisting of two elements. Name the two elements

View More Chemistry Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions