Title Student 1.1 Formulae and Equations Notes 2024-25.pdf ✅

Specification Statement Comment (a) formulae of common compounds and common ions and how to write formulae for ionic compounds Common compounds include the acids HCl, HNO3 , H2SO4 , CH3CO2H, salts of these acids, Group 1 and Group 2 carbonates, hydroxides, oxides and gases such as CH4 , CO2 , NH3 , SO2 . Common ions are those from Groups 1, 2, 6 and 7 elements and compound ions such as NH4 + , NO3 ‒ ,OH‒ , CO3 2‒, SO4 2‒ (b) oxidation numbers of atoms in a compound or ion Candidates do not need to know the definition of oxidation number. Candidates should be able to apply the rules for assigning oxidation numbers in order to work out the oxidation number of an element in a compound or ion from its formula. (c) how to construct balanced chemical equations, including ionic equations, with appropriate use of state symbols Candidates should be able to write balanced equations (full and ionic) for reactions studied. Candidates should be able to write balanced equations for unfamiliar reactions when reactants and products are supplied. AS 1.1 FORMULAE AND EQUATIONS Date Student signed Teacher signed Notes check – To be completed at the end of the topic Reviewed July 2024
AS Topic review Tick the boxes I am happy with this I am not sure yet I have no idea Knowledge / Skill I can recall the formula of common ions I have learnt the formula of common acids and bases I know how to work out the formulae of ionic compounds I know what an ionic equation is I can define oxidation and reduction in terms of electron transfer I can identify reducing agents and oxidising agents in a redox equation I know how to work out the oxidation number of an element in a compound or ion I am able to write an ion-electron half equation I can use oxidation number changes to balance an equation 1.1 FORMULAE AND EQUATIONS
ACIDS BASES SALTS ALKALIS Common compounds Task: in pairs; categorise the following compounds page 1 CaO HCl MgO KOH Ca(NO3 )2 K2CO3 NaOH ZnCO3 ZnCl2 K2O Ca(OH)2 PbNO3 KCl Na2 SO4 HNO3 H2 SO4 KNO3 NiSO4 Task Based on prior knowledge, write a definition for each term that helped you categorise these common compounds Acid: ......................................................................................................................................................................................................... Base: ............................................................................................................................................................................................................. Alkali: ......................................................................................................................................................................................................... Salt: ..............................................................................................................................................................................................................................................
Match the names and the formulae How many atoms of each type are in the following ? a) H2O H = O = b) H2 SO4 H = O = S = c) (NH4 )2 SO4 H = N = O = S = d) CuSO4 .5H2O H = O = S = Cu = e) 2 NaOH H = O = Na = Extra f) 3 Ca(OH)2 H = O = Ca = g) 2 Na2HPO4 H = O = Na = P = h) 2 NH4Al(SO4 )2 .12H2O H = N = O = Al = S = page 2