A 0.11g sample of pure barium was added to 100cm3 of water.Ba(s) + 2H2O(l) → Ba(OH)2(aq) + H2(g)moles of barium added to water = 8.0 × 10-4 molconcentration barium hydroxide of Ba(OH)2 formed = 8.0 × 10-4÷ 0.1dm3= 8.0 × 10-3moldm-3
Example Question - 2
Read the text
Read the text and highlight anything you think is important. When you go on, the text is hidden and you answer from memory.
Specification: AQA Chemistry (7404), AS-level, 3.1.2.2 The mole and the Avogadro constant and 3.1.2.5 Balanced equations and associated calculations. Topic: Amount of Substance.
Key terms in this lesson
- Mole
- The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
More in Amount of Substance
- Example Question - 1
- Example Question - 2
- Molar Concentrations
- Example Question - 1
- The Ideal Gas Equation
- Finding the Number of Moles of Gas
- Finding the Relative Molecular Mass of a Gas
- Example Question - 1
All 33 lessons in Amount of Substance · All AQA AS-level Chemistry topics