A-Level OCR B (Salters) Chemistry COMPLETE
Chemistry
Complete flashcards made from my A-Level class notes, with definitions and practice questions. Also, has bond angles, functional groups and organic toolkit (reactions and reagents/conditions) decks.
Sample Data
| Front | Buffer Calculations: A buffer solution was prepared by adding 20.0cm³ of 0.10moldm-3 NaOH to 50cm³ of 0.10moldm-3 CH3COOH. Ka = 1.74 × 10-5moldm-3. Calculate the pH. |
| Back |
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| Front | Ionisation Energy Definition |
| Back | The first ionisation energy is the energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of +1.
 (In terms of symbols) |
| Front | Why is NaF more endothermic than MgO?MgO ΔLEH = -3800kJmol-1NaF ΔLEH = -928kJmol-1 |
| Back | Na and Mg have the same ionic radius.But Mg has a higher ionic charge of +2 compared to Na's charge of +1. So, Mg is more exothermic, as it has the larger charge density. |