Zn + CuCl2 → ZnCl2 + Cu
Br2 + 2Kl → 2KBr + l2
Zn + 2HCl → H2 + ZnCl2
Cl2 + 2NaBr → Br2 + 2NaCl
3CuCl + 2Al → 3Cu + 2AlCl3
Mg + 2AgNO3 → 2Ag + Mg (NO3)2
For the three reactions that are demonstrated, describe each in as much detail as possible. Include any added catalysts and/or nonreactive substances and provide each of their functions to the reactions. Where possible indicate whether the reaction is endothermic or exothermic.
1. Zn + CuCl2 → ZnCl2 + Cu:
This is a single displacement reaction where zinc (Zn) replaces copper (Cu) in the compound copper chloride (CuCl2). The balanced chemical equation shows that one zinc atom reacts with one copper chloride molecule to form one zinc chloride molecule and one copper atom as the products.
There are no added catalysts or nonreactive substances mentioned in the equation. The reaction is exothermic, meaning it releases energy in the form of heat.
2. Br2 + 2Kl → 2KBr + l2:
This is a double displacement reaction where bromine (Br2) reacts with potassium iodide (KI) to form potassium bromide (KBr) and iodine (I2). The balanced chemical equation indicates that one molecule of bromine reacts with two molecules of potassium iodide to yield two molecules of potassium bromide and one molecule of iodine as the products.
There are no added catalysts or nonreactive substances mentioned in the equation. The reaction is also exothermic.
3. Zn + 2HCl → H2 + ZnCl2:
This is a single displacement reaction where zinc (Zn) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H2) and zinc chloride (ZnCl2). The balanced chemical equation shows that one zinc atom reacts with two hydrochloric acid molecules to form one molecule of hydrogen gas and one molecule of zinc chloride.
In this reaction, hydrochloric acid functions both as the reactant and as the catalyst. It helps speed up the reaction, making it go faster. The reaction is exothermic as it releases energy in the form of heat.
4. Cl2 + 2NaBr → Br2 + 2NaCl:
This is a displacement reaction where chlorine (Cl2) reacts with sodium bromide (NaBr) to produce bromine (Br2) and sodium chloride (NaCl). The balanced chemical equation indicates that one molecule of chlorine reacts with two molecules of sodium bromide to yield one molecule of bromine and two molecules of sodium chloride.
There are no added catalysts or nonreactive substances mentioned in the equation. The reaction is exothermic, meaning it releases energy in the form of heat.
5. 3CuCl + 2Al → 3Cu + 2AlCl3:
This reaction involves a redox reaction between copper chloride (CuCl) and aluminum (Al). The balanced chemical equation shows that three molecules of copper chloride react with two atoms of aluminum to produce three atoms of copper and two molecules of aluminum chloride.
There are no added catalysts or nonreactive substances mentioned in the equation. The reaction is exothermic, releasing energy in the form of heat.
6. Mg + 2AgNO3 → 2Ag + Mg (NO3)2:
This is a single displacement reaction where magnesium (Mg) reacts with silver nitrate (AgNO3) to produce silver (Ag) and magnesium nitrate (Mg(NO3)2). The balanced chemical equation indicates that one magnesium atom reacts with two silver nitrate molecules to yield two silver atoms and one magnesium nitrate molecule.
There are no added catalysts or nonreactive substances mentioned in the equation. The reaction is exothermic, releasing energy in the form of heat.