100PT!!!for Performing and observing replacement reactions!!!!!!!!!!!!!!!!!?

place help me on this %26gt;';%26lt;!!!



(Here was how to do)

Add dilute hydrochloric acid to a test tube to a height of approximately 4 cm. Drop two or three pieces of magnesium into the test tube. After observing the reaction, test the gas produced with a burning splint and record your observations. Allow the reaction to proceed until there are no noticeable changes. Empty the test tube into an evaporation dish. Place the dish in a drying oven or under a lamp for 24h. After all the liquid is gone, record your observations.





and this the quest:

1.A)What evidence was there that a chemical change took place?

B)What type of chemical change was it?



2.A)What were the reactants?

B)What were the products?



help me^^!!!THANkS!!!!100PT!!!for Performing and observing replacement reactions!!!!!!!!!!!!!!!!!?
1. a) You observed a gas being produced (bubbling), so this is a sign of a chemical change.



b) metal + acid ---%26gt; salt + hydrogen

The magnesium metal displaced the hydrogen ions from the solution.



2. a) Mg and HCl

b) MgCl2 and H2



Mg(s) + 2HCl(aq) ---%26gt; MgCl2(aq) + H2(g)100PT!!!for Performing and observing replacement reactions!!!!!!!!!!!!!!!!!?
1A) Bubbles were given off

1B) Redox (i think), and neutralisation

2A) Hydrochloric acid and magnesium

2B) hydrogen gas and magnesium chloride