Question

A silver metal X taken in the form of a ribbon,when ignited,burns in air with a dazzling white flame to form a white powder Y.when water is added to power Y , it dissolves partially to form another substance Z

a. what could metal X be??

b. what is powder Y?

c. with which substances metal X combines to form powder Y?

d. what is substance Z? name one domestic use of this substance?

e. write a balanced chemical equation of the reactions which take place when metal X burns in air to form powder Y .

Answer 1

the substance X is magnesium metal ribbon
it burns with a dazzling white flame to produce MgO precipitate. (Y)
the substance Z is Mg(OH)₂ used as an antacid as it is a mild base
the balanced chemical equation is

2Mg+O₂⇒2MgO
   (X)              (Y)


hope it helps :)

Answer 2

Answer:

x is Mg

y is MgO

Z is Mg(OH)2