Question

write balanced chemical equation for following reactions (a) aluminium react in chlorine to form aluminium chloride (b) potassium metal react with water to give potassium hydroxide and hydrogen gas​

Answer 1

(a)Al³+Cl^-=AlCl_3

(b) K+H_2O=KOH+1/2H_2

Answer 2

Question :

a) Aluminium react in chlorine to form aluminium chloride

Answer :

Al + Cl $\longrightarrow$ $AlCl_{3}$

Balanced chemical equation :

Al + 3Cl $\longrightarrow$ $AlCl_{3}$

Question :

b) Potassium metal react with water to give potassium hydroxide and hydrogen gas.

Answer :

K + $H_{2}O$ $\longrightarrow$ KOH + $H_2$

Balanced chemical equation :

2K + 2$H_{2}O$ $\longrightarrow$ 2KOH + $H_2$

For balancing an equation :

• Identify each element found in the equation and see which elements are not balanced.
• For balanced equation, the number of atoms of each element on the reactant and product side must be equal.
• Remember, to balance an equation, you change the coefficients, not the subscripts in the formulas.

Some Symbols and formulas :

Aluminium = Al

Chlorine = Cl

Aluminium chloride = $AlCl_{3}$

Potassium = K

Water = $H_{2}O$

Potassium hydroxide = KOH

Hydrogen = H

Hydrogen gas = $H_2$