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Chlorine is prepared in the laboratory by treating manganese dioxide(MnO2) with aqueous hydrochloric acid according to the reaction
4 HCl + MnO2 -->2 H2O+ MnCl2 + Cl2
How many grams of HCl reacts with 5 grams of manganese dioxide ?
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4 moles of HCl react with one mole of MnO₂ to give two moles of water and one mole of MnCl₂ and one mole of Cl₂ gas
4 moles of HCl weigh: 146g
1 mole of MnO₂ weighs: 87g
So 5 g MnO₂ will react with:
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So the reaction is,
We get that 4 moles of reacts with 1 mole of to give the product.
- Atomic mass of Hydrogen
- Atomic mass of Chlorine
- Atomic mass of Manganese
- Atomic mass of Oxygen
So in terms of mass,
Multiplying the masses by
This means 8.4 grams of reacts with 5 grams of to give the product.
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