Complete and balance the following chemical equations :
(a) Zn (s) + HCl (aq) ——- >
(b) Na2C03 (s) + HCl (aq) ———>
(c) NaHC03 (s) + HCl (aq) ——–>
(d) NaOH (aq) + HCl (aq) ———>
(e) CuO(s) + HCl (aq) ———->
Lakhmir Singh Chemistry Class 10
Answers
Na2 CO3+ 2HCl →2 NaCl + Co2 + H2O
NaHCO3+HCl → NaCl + CO2 H2O
NaOH+HCl→ NaCl+H2O
CuO+2HCl→CuCl2 + H2O
hope it helps you...
Answer:
(a) Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
(b) Na₂CO₃(s) + 2HCl(aq) → 2NaCl(s) + CO₂(g) + H₂O(l)
(c) NaHCO₃(s) + HCl(aq) → NaCl(aq) + CO₂(g) + H₂O(l)
(d) NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
(e) CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l)
Explanation:
Chemical equations must be balanced in order to apply stoichiometric coefficients to the reactant and products. Chemical equations must adhere to the rule of conservation, and the law of constant proportions is crucial for maintaining their balance. The two fast and simple ways of balancing a chemical equation are the classical balancing approach and the algebraic balancing method.
The reaction's products' directions are shown by the arrowhead points.
When chemical formulae are utilized in place of words, a chemical equation is used to express a chemical reaction. Using the conventional balancing approach, balance the given chemical equation:
Step 1: Add products to the equations that are presented.
Step 2: Count the atoms of each element on the LHS and RHS of the arrow and compare them. The equation is considered to be imbalanced if the number of atoms of each element is the same on both sides of the reaction. The mass is not the same since both sides of the chemical equation are different.
Step: 3 Remember that the rule of conservation of mass stipulates that in a chemical reaction, mass cannot be generated or destroyed. As a result, the total mass of the elements present in the reaction's products must match the total mass of the elements present in the reactants.
(a) Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
(b) Na₂CO₃(s) + 2HCl(aq) → 2NaCl(s) + CO₂(g) + H₂O(l)
(c) NaHCO₃(s) + HCl(aq) → NaCl(aq) + CO₂(g) + H₂O(l)
(d) NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
(e) CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(l)
To know more about the law of conservation, click on the link below:
https://brainly.in/question/26467470
To know more about stoichiometric coefficients, click on the link below:
https://brainly.in/question/9414985
#SPJ6