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Science help?
3. Write word equations for the following reactions:
a) zinc+ sulphuric acid —->
b) sodium + nitric acid —->
c) copper + hydrochloric acid —–>
4. Write symbol equations for the reactions in question 3. Balance them if necessary
3. Write a word equation for the reaction between magnesium and iron oxide.
2. Use your knowledge of reactivity to explain the following
a) Gold is used for electrical wiring in satellites
b) Iron nails last much longer when painted
c) Lead and copper can be used as roofing materials
d) Acid bottles are never made of magnesium
3. "The reactivity of a metal is connected with the date when it was discovered". Say whether you agree with this statement and explain.
3)
a) —>Zinc sulphate + Hydrogen
b)—>Sodium Nitrate + Hydrogen
c)—>Copper chloride + Hydrogen
3)"The reactivity of a metal is connected with the date when it was discovered" bcoz the noble (rarely reacting) metals like platinum, gold and silver were know since the ancient time as they are always available in free form. Reacting metals are difficult to be obtained, So only chemists can make them by using sophisticated methods.
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February 7th, 2010 at 6:18 am
3)
a) —>Zinc sulphate + Hydrogen
b)—>Sodium Nitrate + Hydrogen
c)—>Copper chloride + Hydrogen
3)"The reactivity of a metal is connected with the date when it was discovered" bcoz the noble (rarely reacting) metals like platinum, gold and silver were know since the ancient time as they are always available in free form. Reacting metals are difficult to be obtained, So only chemists can make them by using sophisticated methods.
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