Chemistry · Class 11 · Chapter 1
Some Basic Concepts of Chemistry
12 lessons110 min4 simulations9 practice questions
This chapter sets up the counting and measuring tools the rest of chemistry runs on: how matter is classified, how quantities are measured and reported with honest uncertainty, the laws that led to atomic theory, and the mole as the bridge between grams and particles. It ends with stoichiometry and the ways of expressing concentration, which every later physical chemistry chapter assumes you can do quickly.
Also called: mole concept · stoichiometry · molarity
Lessons
12 lessons · 110 min
01Classifying matterNCERT § "Nature of Matter"7 min02Properties, SI units and measurementNCERT § "Properties of Matter and their Measurement"8 min03Scientific notation, precision and accuracyNCERT § "Uncertainty in Measurement"7 min04Significant figures and dimensional analysisNCERT § "Uncertainty in Measurement"8 min05Laws of chemical combinationNCERT § "Laws of Chemical Combinations"8 min06Dalton's atomic theoryNCERT § "Dalton's Atomic Theory"7 min07Atomic, molecular and formula massesNCERT § "Atomic and Molecular Masses"7 min08The mole and molar massNCERT § "Mole Concept and Molar Masses"10 min1 sim09Percentage composition, empirical and molecular formulaNCERT § "Percentage Composition"10 min1 sim10Stoichiometry and the limiting reagentNCERT § "Stoichiometry and Stoichiometric Calculations"11 min1 sim11Reactions in solutions: concentration termsNCERT § "Reactions in Solutions"11 min1 sim12Chapter reviewMust-know facts, traps and formulas16 min
Simulations
4 in this chapter
From grams to moles to atomsIn: The mole and molar massFrom mass per cent to a molecular formulaIn: Percentage composition, empirical and molecular formulaWhich reactant runs out first?In: Stoichiometry and the limiting reagentMolarity drifts with temperature, molality does notIn: Reactions in solutions: concentration terms