Question

Рассчитайте сумму коэффициентов в уравнении реакции KMnO4 + HCl = KCl + MnCl2 + Cl2 + H2O

Answer 1

16HCl+ 2KMnO₄ = 2MnCl₂ + 5Cl₂ + 2KCl+ 8H₂O 
16+2+2+5+2+8=35

Answer 2

Calculation of Coefficients in the Reaction Equation

To calculate the coefficients in the reaction equation KMnO4 + HCl = KCl + MnCl2 + Cl2 + H2O, we need to balance the equation by ensuring that the number of atoms of each element is the same on both sides of the equation.

Let's go step by step to balance the equation:

1. Start with the potassium (K) atoms. There is one K atom on the left side (KMnO4) and one K atom on the right side (KCl). So, the coefficient for KCl is 1.

2. Next, balance the manganese (Mn) atoms. There is one Mn atom on the left side (KMnO4) and one Mn atom on the right side (MnCl2). So, the coefficient for MnCl2 is also 1.

3. Now, let's balance the chlorine (Cl) atoms. There are four Cl atoms on the left side (KMnO4 and HCl) and two Cl atoms on the right side (KCl and MnCl2). To balance the Cl atoms, we need to add two more Cl atoms on the right side. Therefore, the coefficient for Cl2 is 2.

4. Finally, balance the hydrogen (H) and oxygen (O) atoms by adding water (H2O) to the right side. There are two H atoms on the left side (HCl) and four H atoms on the right side (H2O). To balance the H atoms, we need to add two more H atoms on the left side. Therefore, the coefficient for HCl is 2.

The balanced equation is:

2 KMnO4 + 16 HCl = 2 KCl + 2 MnCl2 + 5 Cl2 + 8 H2O

Now, let's calculate the sum of the coefficients in the balanced equation:

2 + 16 + 2 + 2 + 5 + 8 = 35

Therefore, the sum of the coefficients in the reaction equation KMnO4 + HCl = KCl + MnCl2 + Cl2 + H2O is 35.