Chemsheets A2 1079 Answers Review

(Part 2), you must calculate the and then the Partial Pressure : Total Moles: Add up all moles at equilibrium. Mole Fraction ( ):

Always ensure the sum of all mole fractions in a mixture equals exactly Dalton's Law: The sum of all partial pressures must equal the total pressure given in the question. Stoichiometry: chemsheets a2 1079 answers

A weak acid HA has a concentration of 0.250 M and (K_a = 4.5\times10^-6). Find pH. (Part 2), you must calculate the and then

Calculate the pH of 0.0100 mol/dm³ sulfuric acid (H₂SO₄). Find pH

Note: The exact numbering may vary slightly depending on the printing year, but the core questions remain consistent.

CH4(g)+H2O(g)⇌CO(g)+3H2(g)cap C cap H sub 4 open paren g close paren plus cap H sub 2 cap O open paren g close paren is in equilibrium with cap C cap O open paren g close paren plus 3 cap H sub 2 open paren g close paren 3.0 mol CH4cap C cap H sub 4 H2Ocap H sub 2 cap O Change: -0.6negative 0.6 Equilibrium: 2.4 mol CH4cap C cap H sub 4 H2Ocap H sub 2 cap O COcap C cap O H2cap H sub 2 2. Mole Fractions & Partial Pressures Once you have equilibrium moles, convert them to pressures: Total Moles ( ntotaln sub t o t a l end-sub ): Sum of all equilibrium moles. Mole Fraction ( xAx sub cap A ):