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What can heat help a solid do? - ANS dissolve why should the volumetric flask be shaken when making a standard solution? - ANS to ensure a uniform concentration why is a volumetric pipette more accurate than a measuring cylinder? - ANS smaller uncertainty if the burette isn't rinsed with the substance that will be put in it, residual water might have what effect? - ANS dilute the concentration leading to a larger titre what is the problem with leaving the funnel in the burette? - ANS s...

EDEXCEL A LEVEL CHEMISTRY (PAPER 3) COMPREHENSIVE Q&A FOR GUARANTEED PASS

Edexcel A Level Chemistry (Paper 3) ACTUAL EXAM TEST QUESTIONS & ANSWERS (A+ GRADED 100% VERIFIED) 2025 LATEST!!

Exam of 35 pages for the course Unit 1 - Atomic Structure and the Periodic Table at PEARSON (Mark scheme only)

Exam of 36 pages for the course Unit 1 - Atomic Structure and the Periodic Table at PEARSON (Mark scheme only)

Edexcel A Level Chemistry Practicals Questions And Answers 100% Guaranteed Success. 1)a. fMeasure fthe fmolar fvolume fof fa fgas f(topic f5.2) f- fcorrect fanswers. foverall fequation: fCaCO3 f+ f2CH3COOH f--> fCa(CH3COO)2 f+ fCO2 f+ fH20 Measure fthe fgas fevolved fthrough fan finverted fcylinder for fwith fa fgas fsyringe. f A fweak facid fis fused fto fmake fthe freaction fslower fso fless fgas fis flost fat fa ftime 1)b. fMeasure fthe fmolar fvolume fof fa fgas- fpurpose fa...

Edexcel A level Chemistry questions and answers well illustrated. Ionisation genergy gtrend gin gGroup g2 g- gcorrect ganswers. gAs gyou ggo gdown gthe ggroup gfirst gionisation genergy gdecreases gbecause: - gAlthough gnuclear gcharge gis gincreasing - gThe gelectrons ghave gan gextra gquantum gshell gof gshielding gmaking gthem geasier gto gremove - gThey gexist gin ga ghigher genergy gorbital g(and/ gor ga gfurther gdistance gfrom gthe gnucleus) Reactivity gtrend gin ggroup g2 ...

Edexcel A Level Chemistry (Paper 3) | basically everything | 100% verified correct

Ionisation energy trend in Group 2 - correct answerAs you go down the group first ionisation energy decreases because: - Although nuclear charge is increasing - The electrons have an extra quantum shell of shielding making them easier to remove - They exist in a higher energy orbital (and/ or a further distance from the nucleus) Reactivity trend in group 2 - correct answerGroup 2 elements become more reactive going down a group as the outer two electrons are easier to remove because they h...

Edexcel A Level Chemistry (Paper 3) AgBr + conc NH3 - complex ion AgCl + dilute NH3 - complex ion ammonium test - react with warm NaOH to get NH3 components of the SHE - 0 volts E, Hydrogen gas at 100kpa, H+ ions at 1moldm3, 298k, pt black catalyst (porous an can absorbs hydrogen gas) describe the steps in purifying an organic solid - dissolve the impure compound in a minimum vol of hot solvent, hot filter solution to remove any insoluble impurities, cool the fi...