Question

quiz 5
question 1 write a balanced chemical equation for this scenario: a piece of zinc is added to hydrochloric acid (hcl), and produces zinc chloride and hydrogen gas
question 2 write a balanced chemical equation for this scenario: when aluminum metal reacts with iron (iii) oxide, it forms aluminum oxide and iron
question 3 write a balanced chemical equation for this synthesis reaction: gallium mixes with sulfur
question 4 write a balanced chemical equation for this decomposition reaction: beryllium carbonate is heated up and breaks down
question 5 write a balanced chemical equation for this decomposition reaction: ethanol (c₂h₅oh) is burned
question 6 write the balanced chemical equation for this single replacement reaction: a piece of zinc is added to a copper(ii) chloride solution
question 7 write the balanced chemical equation for this single replacement reaction: a piece of lead (ii) is placed in a silver nitrate solution
question 8 write the balanced chemical equation for this single replacement reaction: a piece of platinum is placed in hydrochloric acid (hcl)

Explanation:

Step1: Identify reactants and products for Question 1

Reactants are Zn and HCl, products are ZnCl₂ and H₂. Balanced equation: $Zn + 2HCl
ightarrow ZnCl_{2}+H_{2}$

Step2: Identify reactants and products for Question 2

Reactants are Al and Fe₂O₃, products are Al₂O₃ and Fe. Balanced equation: $2Al + Fe_{2}O_{3}
ightarrow Al_{2}O_{3}+2Fe$

Step3: Identify reactants and products for Question 3

Reactants are Ga and S, product is Ga₂S₃. Balanced equation: $2Ga + 3S
ightarrow Ga_{2}S_{3}$

Step4: Identify reactants and products for Question 4

Reactant is BeCO₃, products are BeO and CO₂. Balanced equation: $BeCO_{3}
ightarrow BeO + CO_{2}$

Step5: Identify reactants and products for Question 5

Reactant is C₂H₅OH, products are CO₂ and H₂O. Balanced equation: $C_{2}H_{5}OH + 3O_{2}
ightarrow 2CO_{2}+3H_{2}O$

Step6: Identify reactants and products for Question 6

Reactants are Zn and CuCl₂, products are ZnCl₂ and Cu. Balanced equation: $Zn + CuCl_{2}
ightarrow ZnCl_{2}+Cu$

Step7: Identify reactants and products for Question 7

Reactants are Pb and AgNO₃, products are Pb(NO₃)₂ and Ag. Balanced equation: $Pb + 2AgNO_{3}
ightarrow Pb(NO_{3})_{2}+2Ag$

Step8: Identify reactants and products for Question 8

Reactants are Pt and HCl, no reaction occurs as platinum is less reactive than hydrogen. So no balanced chemical - equation can be written.

Answer:

Question 1: $Zn + 2HCl
ightarrow ZnCl_{2}+H_{2}$
Question 2: $2Al + Fe_{2}O_{3}
ightarrow Al_{2}O_{3}+2Fe$
Question 3: $2Ga + 3S
ightarrow Ga_{2}S_{3}$
Question 4: $BeCO_{3}
ightarrow BeO + CO_{2}$
Question 5: $C_{2}H_{5}OH + 3O_{2}
ightarrow 2CO_{2}+3H_{2}O$
Question 6: $Zn + CuCl_{2}
ightarrow ZnCl_{2}+Cu$
Question 7: $Pb + 2AgNO_{3}
ightarrow Pb(NO_{3})_{2}+2Ag$
Question 8: No reaction occurs.