Round bottom flask - Study guides, Class notes & Summaries

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023 | VERIFIED. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath ...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath NOT any ind...

Weighing a solid - CORRECT ANSWER 1. Zero the balance 2. Place weighing bottle/boat onto balance and add in the approximate required mass of solid 3. Accurately weigh solid and weighing bottle and record 4. Empty solid into glassware where it will be used 5. Accurately reweigh empty weighing bottle 6. Subtract recorded mass for empty weighing bottle from mass recorded for solid and weighing bottle Measuring a volume of a liquid using a pipette - CORRECT ANSWER ...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023 | VERIFIED. there is a bung/stopper (in the end of the condenser) M2 idea of pressure build up M3 water goes the wrong way through the condenser M4 water does not fill the condenser / condenser is not cool enough owtte M2 stopper could be forced out IGNORE glass shatters / explodes water in at top / out at bottom IGNORE condenser is wrong way round ALLOW less condensing / vapour/gas/reactants/products will not condense / no...

Accuracy - correct answer a measurement giving the actual value for the sample with limited deviation Precision - correct answer repeatability of a set of measurements on the same sample Test tubes - correct answer Good for small/large quantity of samples Round bottom flask - correct answer used for reaction, heating or vacuum Retort - correct answer round vacuum flask used for distillation Buret - correct answer Good for titrations, delivers liquid slowly Volumetric pipet - co...

A-Level Chemistry PAG 6: Synthesis Of An Organic Solid Questions And Answers | Latest Version | Graded A+ **Question:** What are the necessary equipment and materials for the synthesis of benzoic acid via reflux and recrystallization? **Answer:** Required equipment includes: - Measuring cylinder (10 cm3) - Dropping pipettes - Quickfit apparatus: pear-shaped or round-bottom flask, Liebig condenser and tubing - 250 cm3 beaker - Glass rod - Anti-bumping granules - Apparatus for fil...

OAT-Chemistry EXAM WITH 100% CORRECT ANSWERS Accuracy - correct answersa measurement giving the actual value for the sample with limited deviation Precision - correct answersrepeatability of a set of measurements on the same sample Test tubes - correct answersGood for small/large quantity of samples Round bottom flask - correct answersused for reaction, heating or vacuum Retort - correct answersround vacuum flask used for distillation Buret - correct answersGood for titrations,...

OAT-Chemistry With Complete Solutions Latest Update...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath NOT any ind...

Accuracy - correct answer Refers to a measurement giving the actual value for a sample with a limited deviation; example: determining the weight of a sample to be 1g plus or minus 0.001g Precision - correct answer Repeatability of a set of measurements, and getting very close values to each other. Test tubes - correct answer small tubes that allow a large number of samples to be arrayed in a rack for easy processing. Beakers - correct answer Wide-mouthed cylinders with a lip to allow po...