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level: Level 1 of Kap2

Questions and Answers List

level questions: Level 1 of Kap2

QuestionAnswer
finding a relative molecular mass in gass eq1. Conversions 2.work out what you know 3. figure out eq ( pv=nrt) or (n=vx24000 or 24) 4. work out your moles for the eq mr= m/n
Stoichiometrythe ratio of the balanced equation
reacting masses1. work out the moles of the info provided 2. check the stoichiometry ratio to see if it needs x or / 3. then put in m=nxmr or different for gas or conc
unknown metal1. work out moles 2. check stoich 3. work out moles/ mass = mr 4. periodic table
Percentage yieldactual yield/ theoretical yield x 100 1. work out the moles of both depending on the question may have to work backwards
Atom Economysum of molar mass of desired / sum of molar mass of all products x 100 x + x = h + co2 h/ co2 + h for substainability
Strong acidH+ ions completely dissoaciates
Weak acidsPartially dissociates
BaseProton acceptor
AcidProton donor
Ionic equationsSolids- don’t split Liquids - don’t split Gases don’t split Aqueous split
Standard solution in burietDivide by mean titre
Standard solution in conical flaskDivide by 25 cm
Mean tirePut 23.0
./. UncertaintyUncertainty/ volume measured x 100