Question

Reset Help Chemical Reactions Chemical Equations |O2(g)--> 2CO2(g) +1 Ag(s)+ Cl2(g) Combustion CHOI l(l) + | 1H2O(l) + energy Decomposition Single replacement Double replacement AgCl(s) → AgNO3(aq) + Zn(s) → g(s)+Zn(NOs)2laq) Bacl2(aq) +사(SO4)3(aq)-> 3BaSOg(s) + | |AICI3(aq) Combination H2(g) + 12(g) →

Answer 1

An equation is said to be balanced when the number of atoms on either side of the equation are equal. First count and see the atoms. If they are not equal multiply the with appropriate positive whole number or fraction in which ever side wanted.

$C_2H_5OH(l)+7/2H_2O(g)\rightarrow 2CO_2(g)+3H_2O(l)$

Here the carbon number is balanced . 2 on both sides. But the H is not. Its 6 on reactant side and 2 on product side. So multiply the product side H2O by 3. Then do balance the O by multiplying by 7/2, as there are 7 O on product side. So if u multiply the reactant Oby 7/2 then it will become 7 (7/2* 2). Thus all of them becomes balanced.

$2AgCl(s)\rightarrow 2Ag(s)+Cl_2(g)$

$2AgNO_3(aq)+Zn(s)\rightarrow 2Ag(s)+Zn(NO_3)_2(aq)$

$3BaCl_2(aq)+Al_2(SO_4)_3(aq)\rightarrow 3BaSO_4(s)+2AlCl_3$

$H_2+I_2\rightarrow 2HI(g)$