Download + CuO Cu + O

Complete:
1- When we heat mercuric oxide, we get …………………… and ……………….
2- When copper hydroxide is heated, it will decompose into ………………
and ………………………….
3- When calcium carbonate is heated, ……………………………. And
……………………………. Are obtained.
4- Copper sulphate is decomposed by heat into ……………………………………
5- Active metals react with water as they substitute hydrogen of water
which rises and produce ……………………….
6- 2Na + 2 𝐻2 O
2NaOH + heat + ……………………………..
7- Zinc reacts with dilute hydrochloric acid and …………………………… salt is
formed.
8- The reaction between acid and alkali gives ………………………. And
………………………. And this reaction is called …………………………….
9- Clear lime water turbid on passing ……………………………. Gas through it
10- On adding silver nitrate solution to sodium chloride solution, a
…………………………… precipitate is formed with ………………………
colour.
∆
11- In the reaction 𝐻2 + CuO
→
Cu + 𝐻2 O
a- copper oxide undergoes ………………………… process, while hydrogen
undergoes …………………………. Process.
b- copper oxide is considered as ………………………. Agent, while
hydrogen is considered as ………………………. Agent.
12- Oxidation is the chemical process involves an increase in the
percentage of ………………………….. gas
13- Most metal carbonates decomposes by heating into ……………………..
and 𝐶𝑂2 .
𝑑𝑖𝑙.
14- Fe + 2 HCl →
………………………………. + ………………………..
15- Chemical reaction is a process that involves ………………………… in the
reactants molecules and formation of ……………………… in the product
molecules.
16- During …………………… reactions, the compound is broken up by heat
into simpler components.
17- Sodium reacts with water giving ………………………. And …………………..
gas evolves.
18- On passing hydrogen gas over hot copper oxide, copper oxide is
converted into …………………………..
19- In the equation 2Na + 𝐶𝑙2
2NaCl ……………………………
process happens to chlorine.
Complete the following equations, then mention the type of reaction:
∆
1- 2HgO →
………………… + ……………………. (………………………………)
2- 2Na + 2 𝐻2 O
…………….. + …………… + ……………….
(……………………………..)
∆
3- Cu(𝑂𝐻)2 →
4- Cu𝐶𝑂3 →
5- Cu𝑆𝑂4 →
…………….. + …………….. (…………………………….)
∆
………………. + …………….. (……………………………..)
∆
…………….. + …………….. (……………………………….)
∆
6- CuO + 𝐻2 →
𝑑𝑖𝑙.
7- Cu + HCl →
𝑑𝑖𝑙.
8- Zn + 2HCl →
………….. + ………….. (……………………………………..)
…………………
………………. + …………. (………………………………..)
𝑑𝑖𝑙.
9- 𝑁𝑎2 𝐶𝑂3 + 2HCl →
∆
(……………………………….)
…………. + …………+…………. (………………………)
10- 2Na𝑁𝑂3 →
……………… + …………… (……………………………….)
11- Mg + Cu𝑆𝑂4
………………….. + ……………….
(………………………….)
12- …………….. + ……………..
NaCl + 𝐻2 O (………………………………)
13- NaCl + Ag𝑁𝑂3
14- 𝐻2 + …………. →
………….. + …………. (………………………………..)
∆
Cu + 𝐻2 O (……………………………….)
Illustrate by balanced chemical equation the following reactions:
1- The effect of heat on red mercuric oxide.
……………………………………………………………………………………………………
2- The effect of heat on sodium nitrate.
……………………………………………………………………………………………………
3- The effect of heat on copper hydroxide.
……………………………………………………………………………………………………
4- The effect of heat on copper carbonate.
…………………………………………………………………………………………………..
5- Heating of blue copper sulphate
……………………………………………………………………………………………………
6- The reaction of water with sodium (what are the required precautions
for the reaction)
……………………………………………………………………………………………………
……………………………………………………………………………………………………
7- The reaction of zinc with dilute hydrochloric acid.
……………………………………………………………………………………………………
8- Adding of aluminum turnings to dilute hydrochloric acid.
……………………………………………………………………………………………………
9- The reaction of magnesium with copper sulphate.
…………………………………………………………………………………………………….
10- The reaction of hydrochloric acid with sodium hydroxide. (what’s the
name of the reaction?)
……………………………………………………………………………………………………
……………………………………………………………………………………………………
11- The reaction of sodium carbonate with dilute hydrochloric acid.
…………………………………………………………………………………………………….
12- Adding silver nitrate solution to sodium chloride solution.
……………………………………………………………………………………………………
13- Reduction of hot copper oxide by passing hydrogen gas.
…………………………………………………………………………………………………..
Choose:
1- Most metal sulphates decompose when heated to metal oxide and
………………… gas. (𝐶𝑂2 - 𝑂2 - 𝑆𝑂2 - 𝐶𝑂3 )
2- On heating Copper Sulphate, a ……………………… precipitate is formed.
(black – green – blue – reddish brown )
3- Some metal Nitrates are decomposed by heat into ……………………..
(metal nitrate and oxygen gas – metal nitrate and oxygen gas
nitrogen oxide and oxygen gas – no correct answer )
4- Some metals can replace another one in the solution of these metals
which …………………………….
a-follow it in chemical activity series b-precede it in chemical activity
series
c- (a and b) are correct
d- no correct answer
5- The metal which can’t replace the hydrogen of acid is …………………..
( aluminum – zinc – copper – sodium )
6- On adding copper turnings to dilute hydrochloric acid, ……………………
is produced.
(copper hydroxide – copper carbonate – copper chloride – no reaction)
7- …………………….. doesn’t substitute hydrogen of dilute acid.
(Lead – Silver – Iron – Zinc )
8- When magnesium replaces copper in its salt solution replaces copper in
its salt solution a ……………………… precipitate is formed.
(black – red- reddish brown – no correct answer )
9- The oxidizing agent is the substance which ………………………… during a
chemical reaction.
a-gives oxygen b- removes hydrogen c-loses hydrogen d- (a and b)
10- The reducing agent is the substance that ………………………
a-gives oxygen b- removes oxygen c-gives hydrogen d- (b and c)
11- When sodium atom loses an electron from its outermost energy level,
it becomes …………………
a- oxidized b-reducing agent c- reduced
d- (a and b)
Put (√) or (x) and correct the mistake:
1- Sulphur dioxide is produced on heating blue copper sulphate. (
)
………………………………………………………………………………………………….
2- The reaction between an acid and alkali forming salt and water is called
simple substitution reaction. (
)
……………………………………………………………………………………………………
3- Reduction is a chemical process where the atom loses electrons. ( )
…………………………………………………………………………………………………..
4- Oxidation and reduction reactions take place separately. (
)
………………………………………………………………………………………………….
Write the scientific term:
1- The arrangement of the metals in a descending order according to the
degree of their chemical activity is called ( ……………………………………….)
2- The substance which loses an electron or more during a chemical
reaction. (…………………………………………)
3- The substance which takes oxygen away or gives hydrogen during a
chemical reaction. (………………………………………..)
4- A chemical process in which an atom loses an electron or more.
(………………………………………..)
5- A chemical process in which an atom of the element gains one electron
or more. (……………………………………….)
6- The breaking up of bonds between molecules of the reactants and the
formation of new bonds between the molecules of the products.
(………………………………………)
7- Chemical reactions in which the compound is broken up into simpler
one by the effect of heat. (………………………………………..)
8- A reaction where an element substitutes another one in its salt solution.
(……………………………………)
9- The reaction of an acid and an alkali to give salt and water.
(…………………………………….)
10- A chemical process which causes the increase in the oxygen
percentage or the decrease in hydrogen percentage.
(……………………………………..)
11- The process of changing 𝐹𝑒 +2 to 𝐹𝑒 +3 according to the equation:
𝐹𝑒 +2
𝐹𝑒 +3 + electrons. (……………………………………………)
Arrange the following elements in a descending according to chemical
activity
Pb - Na - Al - Ag - Ca
………………………………………………………………………………………………………
Give reason:
1- In the reaction 2Na + 𝐶𝑙2
2NaCl
sodium 𝑁𝑎11 is a reducing factor, while chlorine is considered as an
oxidizing agent.
……………………………………………………………………………………………………
…………………………………………………………………………………………………...
2- Oxidation and reduction are concurrent processes that happen at the
same time.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
3- Sodium is monovalent.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
4- The blue color of copper sulphate turns into black by heating.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
5- A black substance is formed on heating green copper carbonate.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
6- Copper doesn’t react with dil. HCl acid.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
7- Gold doesn’t react with dil. Acids.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
8- The reaction between aluminum and dil. HCl takes a short time to start
……………………………………………………………………………………………………
……………………………………………………………………………………………………
9- Aluminum delays in its reaction with dil. HCl after zinc although
aluminum proceeds zinc in the chemical activity series.
……………………………………………………………………………………………………
…………………………………………………………………………………………………..
10- Magnesium substitutes copper in copper sulphate solution, while the
opposite can’t happen.
……………………………………………………………………………………………………
…………………………………………………………………………………………………..
11- A reddish brown precipitate is formed when magnesium is add to
copper sulphate solution.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
12- We can’t keep silver nitrate in an aluminum cane.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
13- The occurrence of effervescence on putting a piece of aluminum in
diluted hydrochloric acid.
……………………………………………………………………………………………………
……………………………………………………………………………………………………
∆
14- In the reaction 𝐻2 + CuO
→
Cu + 𝐻2 O
hydrogen is considered as a reducing agent, while copper oxide is
considered as an oxidizing agent.
……………………………………………………………………………………………………
…………………………………………………………………………………………………...
What’s meant by:
1- Chemical reaction: ……………………………………………………………………….
……………………………………………………………………………………………………
2- Substitution reaction: …………………………………………………………………….
……………………………………………………………………………………………………
3- Chemical activity series: ………………………………………………………………..
…………………………………………………………………………………………………
4- Neutralization reaction: ………………………………………………………………..
…………………………………………………………………………………………………..
5- Oxidation process: ………………………………………………………………………
…………………………………………………………………………………………………..
6- Reduction process: ………………………………………………………………………
…………………………………………………………………………………………………..
7- Oxidizing agent: …………………………………………………………………………..
…………………………………………………………………………………………………..
8- Reducing agent: …………………………………………………………………………..
……………………………………………………………………………………………………
Compare between:
1- Heating of metal oxide and metal hydroxide.
2- Oxidation and reduction process.
3- Oxidizing agent and reducing agent.