Stoichiometry notes

Description

Stoichiometry

Notes on atomic weight, molecular weight, mole

concept Criss-Cross Method

Molecular Weight Calculations

Mole Concept and problems

Calculate mass of 0.5 mole of CO₂

Write relation between moles and Avogadro’s

number

Q. If 3.5 moles of methanol burnt in O2, calculate A.

How many moles of O2 is used B. How many moles

of water produced

How many moles of the following are required to

manufacture 5.0 moles of NH3.

Iron can be produced from Fe2O3 by reacting with

CO. CO2 is produced in this reaction. What mass of

iron can be formed from 425 g of iron ore.3. The main engine if Indian space shuttle are

powered by liquid Hydrogen and liquid Oxygen.

If 1.02×10⁵ kg of liquid Hydrogen is carried on

particular launch, what mass of liquid Hydrogen

4. How many moles of Oxygen molecule are there

in 50 dm³ of Oxygen gas at STP

5. What volume of 0.80 moles of N2 gas occupy at

What volume of 0.80 moles of N2 gas occupy at

STP.

Gay-Lussac’s Law

→Limiting reactant is the reactant that gets completely

used up first in a chemica

1. 200 g of K2Cr2O7 was reacted with 200 g of

H2SO4 . Calculate

A. Mass of atomic Oxygen produced

B. Mass of reactant left unreacted

2. 20 h of H2SO4 on dissolving in water ionizes

completely. Calculate A. No of H2SO4

molecules B. No of H+ and So4²-

4. Magnesium metal reacts with Sulphur to

produce MgS. How many grams of MgS can be

made from 1.5 of Mg and 1.5 g of Sulphur.5.Aluminium reacts with bromine to firm AlBr3. If

15.8 g of Al and 55.6 g of Br2 are available for

reaction then determine

A.Limiting reactant. B. The mass of AlBr3

6. Suppose 1.87 moles of NH4Cl were reacted with

1.35 mole of CaOH2. How many grams of CaOH2 are

left unreacted?

*Percentage yield tells us how much product is

actually obtained co

Actual Yield

Percentage yield

1.274 g of CuSO4 when reacted with excess of Zn

metal yield of 0.392 g of Cu metal was obtained.

Calculate percentage Yield

2