Question

what volume of Cl2 at STP would be evolved by adding 17.4g of MnO2 in HCl solution​

Answer 1

SOLUTION-;

•  molar mass =36.4
• Mn O2 : 54.9 + 32 = 86.9
• 4 moles of HCl = 145.6 grams reacts with 1 mole of Mn O2 ie., 86.9 grams..
• So  mass of HCl that reacts with 5.0 grams of Manganese dioxide :
•           5 * 145.6 / 86.9  = 8.377 grams of HCl.