Keep this cheat sheet handy while completing your A2 1079 tasks: Key Formula Common Pitfall to Avoid Kwcap K sub w increases with temperature; it is not always Gas Equilibrium
Ka=[H+][A−][HA]cap K sub a equals the fraction with numerator open bracket H raised to the positive power close bracket open bracket A raised to the negative power close bracket and denominator open bracket HA close bracket end-fraction is the concentration of the undissociated weak acid. is the concentration of the conjugate base (salt). is the hydrogen ion concentration. Core Calculation Methods Required for A2 1079
Write the mechanism for the nitration of benzene using a mixture of concentrated HNO₃ and H₂SO₄.
Master Chemsheets A2 1079: Electrochemistry Answers and Exam Guide
Advanced questions test the buffer's resilience by adding a strong acid ( H+H raised to the positive power ) or strong base ( OH−OH raised to the negative power The added H+H raised to the positive power reacts with the conjugate base ( A−A raised to the negative power Moles of HAMoles of HA increase by the amount of added H+H raised to the positive power Moles of A−Moles of A raised to the negative power decrease by the amount of added H+H raised to the positive power If Base ( OH−OH raised to the negative power ) is added: The added OH−OH raised to the negative power reacts with the weak acid ( Moles of HAMoles of HA decrease by the amount of added OH−OH raised to the negative power Moles of A−Moles of A raised to the negative power increase by the amount of added OH−OH raised to the negative power chemsheets a2 1079 answers
Equilibrium quantities (initial, change, equilibrium moles). Calculation of . Calculation of partial pressures . Formulating Kpcap K sub p expressions. Determining units for Kpcap K sub p
is used for . It is defined using the partial pressures of the gases involved. For a generic reversible reaction: The equilibrium expression for Kpcap K sub p is written as: represents the partial pressure of each respective gas. Step-by-Step Guide to Solving Chemsheets 1079 Problems To find the Kpcap K sub p
Over the years, examiners and teachers have noted recurring errors when students complete this worksheet:
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Rate=k[A][B]2⟹k=Rate[A][B]2Rate equals k open bracket cap A close bracket open bracket cap B close bracket squared ⟹ k equals the fraction with numerator Rate and denominator open bracket cap A close bracket open bracket cap B close bracket squared end-fraction To find the units: Substitute units ( mol dm-3mol dm to the negative 3 power ) into the rearranged equation.
Correct reagents & conditions (temperature, solvent, catalyst), correct order of steps (don’t acylate before nitrating), and correct final structure.
To help you clear any hurdles with this worksheet, please share from sheet 1079 you are working on. I can walk you through the exact numerical calculation , help you write the balanced redox equation , or break down the cell notation . Share public link Core Calculation Methods Required for A2 1079 Write
) : Multiply the mole fraction by the total system pressure ( Ptotalcap P sub total end-sub Core Formulas
expression and multipliers in the "Change" row of your ICE table.
Unit Conversion: kPa×kPa3kPa×kPa=kPa2Unit Conversion: the fraction with numerator kPa cross kPa cubed and denominator kPa cross kPa end-fraction equals kPa squared Top Tips to Avoid Losing Marks on Exams Kpcap K sub p
Part 3 of Chemsheets A2 1079 transitions into formulating the final equilibrium constant expression. Unlike Kccap K sub c , which utilizes concentrations in square brackets Kpcap K sub p strictly requires partial pressure notation with standard parentheses. Formulation Rules Always put .