Balancing of Chemical Equations

Q.

Lead nitrate solution is added to the test tube containing Potassium iodide solution. $\left(\mathrm{i}\right)$ Write the name and color of the compound precipitated. $\left(\mathrm{ii}\right)$Write the balanced chemical equation for the reaction involved $\left(\mathrm{iii}\right)$Name the type of reaction justifying your answer.

Q.

Write down the balanced chemical equation:

Hydrogen plus oxygen produces water

Q.

List the steps to write a chemical equation.

Q.

Balance the equation:-${\mathrm{C}}_2{\mathrm{H}}_4+{\mathrm{O}}_2\to {\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

Q.

Write a balanced chemical equation for the following and identify the type of reaction of each case:

$\mathrm{KBr}+{\mathrm{BaI}}_2\to \mathrm{KI}+{\mathrm{BaBr}}_2$

Q.

Write the balanced chemical equation of the following word equation:

Aluminium + Sodium Hydroxide + Water → Sodium Meta Aluminate + Hydrogen

Q.

Rewrite the following information in the form of a balanced chemical equation.

“Magnesium burns in carbon dioxide to form magnesium oxide and carbon.”

Q.

Write the balanced chemical equation:

A white precipitate of Silver chloride is formed by adding a solution of Sodium chloride to the Silver nitrate solution.

Q.

"Barium chloride reacts with aluminum sulfate to give aluminum chloride and precipitates of barium sulfate."

1. Translate the above statement into a chemical reaction.
2. State two types in which this reaction can be classified.

Q. What will be $\text{A+B+C}$ if the following reaction is balanced?

${\text{AFeCl}}_3\text{(aq)}+\text{BMgO}\text{(s)}\to {\text{Fe}}_2{\text{O}}_3\text{(s)}+{\text{CMgCl}}_2\text{(aq)}$

1. 8
2. 9
3. 7
4. 10

Q. Balance the following chemical equations and identify the type of chemical reaction.

(a) $\text{Mg(s)}+{\text{Cl}}_2\text{(g)}\to {\text{MgCl}}_2\text{(s)}$
(b) $\text{HgO(s)}\stackrel{\text{Heat}}{\to }\text{Hg(l)}+{\text{O}}_2\text{(g)}$
(c) $\text{Na(s)}+\text{S(s)}\stackrel{\text{Fuse}}{\to }{\text{Na}}_2\text{S(s)}$
(d) ${\text{TiCl}}_4\text{(l)}+\text{Mg(s)}\to \text{Ti(s)}+{\text{MgCl}}_2\text{(s)}$
(e) $\text{CaO(s)}+{\text{SiO}}_2\text{(s)}\to {\text{CaSiO}}_3\text{(s)}$
(f) ${\text{H}}_2{\text{O}}_2\text{(l)}\stackrel{\text{UV}}{\to }{\text{H}}_2\text{O(l)}+{\text{O}}_2\text{(g)}$

Q.

Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.

(a) nitrogen gas is treated with hydrogen gas in the presence of a catalyst at $773\mathrm{K}$ to form ammonia gas.

Q.

Balance the following chemical equation and identify the type of chemical reaction.

$\underset{}{\mathrm{HgO}\left(\mathrm{s}\right)}\stackrel{∆}{\to }\mathrm{Hg}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Q.

Which of these chemical equations is not balanced?

1. ${\text{CO}}_2\text{(g)}+6{\text{H}}_2\text{O (l)}\to {\text{C}}_6{\text{H}}_{12}{\text{O}}_6\text{(s)}+6{\text{O}}_2\text{(g)}$

2. $2\text{Mg (s)}+{\text{O}}_2\text{(g)}\to 2\text{MgO (s)}$

3. ${\text{CaCO}}_3\text{(s)}\to \text{CaO (s)}+{\text{CO}}_2\text{(g)}$

4. ${\text{CuCl}}_2\text{(aq)}+{\text{Pb (NO}}_3{)}_2\text{(aq)}\to {\text{Cu(NO}}_3{)}_2\text{(aq)}+{\text{PbCl}}_2\text{(g)}$

Q.

Write the balanced and informative chemical equation for the following

Magnesium ribbon burns in the air to produce magnesium oxide.

Q.

When silver nitrate is added to sodium chloride.

Q.

Balance the given equation:

${\mathrm{Na}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{NaOH}$

Q.

51. Balance the following equation. Also name the products formed.
${\mathrm{NaNO}}_3\to {\mathrm{NaNO}}_2+{\mathrm{O}}_2$

Q. Slide to the correct value of x to balance the given equation.

${\mathrm{Fe}}_2{O}_3\left(s\right)+3H_2\left(g\right)\to 2\mathrm{Fe}\left(s\right)+{\mathrm{xH}}_{2}O\left(l\right)$

1. 3

Q. Slide to the correct value of x to balance the given equation.

${\mathrm{Fe}}_2{O}_3\left(s\right)+3H_2\left(g\right)\to 2\mathrm{Fe}\left(s\right)+{\mathrm{xH}}_{2}O\left(l\right)$

1. 3

Q. When a reaction takes place, the mass of the individual elements changes after the reaction is over.

1. False
2. True

Q.

In an experiment, sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water. Which of the following correctly represents the balanced equation (with physical states) for this experiment?

1. NaOH (aq) + HCl (l) → NaCl (aq) + $H_{2}O$ (l)

2. NaOH (aq) + HCl (aq) → NaCl (aq) + $H_{2}O$ (l)

3. NaOH (aq) + HCl (aq) → NaCl (aq) + $H_{2}O$ (aq)

4. NaOH (aq) + HCl (l) → NaCl (aq) + $H_{2}O$ (aq)

Q.

Balance the following equation:

$\mathrm{Fe}+{\mathrm{O}}_2\to {\mathrm{Fe}}_2{\mathrm{O}}_3$

Q.

State one reason why tap water is not used to prepare a solution of silver nitrate in the laboratory?