Question

Which of the following equations is not balanced?

A) OKClO_3 → KCl + O_2
B) MgI_2 + Br_2 → MgBr_2 + I2
C) O_2 + 3H_2 → 2NH_3
D) HCl + NaOH → NaCl + H_2O

Answer 1

Upon review, equation A) KClO3 → KCl + O2 is not balanced. It would need to be balanced by adding coefficients, such as 2KClO3 → 2KCl + 3O2, for it to adhere to the law of conservation of mass.

Step-by-step explanation:

To determine which of the following equations is not balanced, let's examine each one:

• A) 2KClO3 → 2KCl + 3O2 (This is the corrected version of the equation. Without the coefficients, it is not balanced.)
• B) MgI2 + Br2 → MgBr2 + I2 (This equation is already balanced.)
• C) O2 + 3H2 → 2NH3 (This equation is already balanced as well.)
• D) HCl + NaOH → NaCl + H2O (This equation is a typical representation of an acid-base neutralization and is balanced.)

In conclusion, option A is the one which is not balanced in its original form, requiring coefficients to ensure the same number of each element exists on both sides of the equation.