Equations

Question 1

State the equation for moles in solution.

Answer 1

m = c * v

Question 2

State the equation for moles from mass.

Answer 2

moles = mass / mr

Question 3

state the ideal gas eqation with units.

Answer 3

P(pa)V(m3) = nRT(k)

Question 4

State the equation for percent atom economy.

Answer 4

%AE = 100*(sum of products mr / sum of reactant mr)

Question 5

State the equation for q

Answer 5

q = mc*ΔT

Question 6

State the equation for enthalpy change from with q

Answer 6

ΔH = -q / moles

Question 7

State the rate equation

Answer 7

Rate = k[A]^m [B]^n

Question 8

State the arrhenius equation

Answer 8

k = Ae^ (-Ea/RT)

Question 9

State the equation for lnk as y=mx+c

Answer 9

lnk = -Ea/R * 1/T + lnA

Question 10

State the equation for activation energy.

Answer 10

Ea = RT * (lnA-lnK)

Question 11

State the half equations within a rechargeble cell.

Answer 11

Positive electrode: Li+ + CoO2 + e- -> Li+[CoO2]-
Negative electrode: Li -> Li+ + e-

Li + + CoO2 -> Li+[CoO2]-

Question 12

State the definition of pH

Answer 12

pH = -log10[H+]

Question 13

State the ionic product of water and its value at 27oc 1

Answer 13

Kw = [H+][OH-]

10^-14

Question 14

State the equation for Ka and pKA

Answer 14

Ka = ([H+][A-])/[HA]
ka = 10^-pKa

Question 15

State the equation for the reaction between sulfric acid and sodium chloride

Answer 15

NaCl(s) + H2SO4(l) -> NaHSO4(s) + HCl(g)

Question 16

State the equation for the reaction between bromide and sulfric acid

Answer 16

2H+ + 2Br- + H2SO4(l) -> SO2(g) + 2H2O(l) + Br2(g)

Question 17

State the equation for the reaction between iodide ions and sulfric acid.

Answer 17

8H+ + 8I- + H2SO4(l) -> H2S(g) + 4H2O + I2

Question 18

State the equation for silver ions and chloride.

Answer 18

Cl-(aq) + Ag+(aq) -> AgCl(s)

Question 19

State the equation for silver ions and bromide.

Answer 19

Br-(aq) + Ag+(aq) -> AgBr(s)

Question 20

State the equation for silver ions and iodidie.

Answer 20

I-(aq) + Ag+(aq) -> AgI(s)

Question 21

State the equation for silver ions and carbonate ions

Answer 21

2Ag+(aq) + CO3 2-(aq) -> Ag2CO3(s)

Question 22

State the equation for silver ions and hydroxide ions.

Answer 22

Ag+(aq) + OH-(aq) -> AgOH(s)

Question 23

State the equation for % error

Answer 23

% error = (uncertainty(max error) / measured) * 100

Question 24

State the equation for the thermal demomposition fo NaHCO3

Answer 24

2 NaHCO3 → Na2CO3 + H2O + CO

Question 25

State the equation for enthalpy change.

Answer 25

ΔH = sum of H products - sum of H reactants

Question 26

State the equation for entropy change

Answer 26

ΔS = sum of S products - sum of S reactants.

Question 27

State the equation for gibbs free energy

Answer 27

ΔG = ΔH - TΔS

Question 28

State the equation for chlorine reacting with water

Answer 28

Cl2(aq) + H2O(l) HClO(aq) + HCl(aq)
this is driven to completion
Cl2(aq) + 2H2O(l) -> 4HCl(aq) + O2(g)

Question 29

State the equation for sodium hypochlorite and water.

Answer 29

NaClO(s) + H2O(l) Na+(aq) + OH-(aq) + HClO(aq)

Question 30

state the eqation for the reation between chlorine and sodium hydroxide.

Answer 30

Cl2(g) + 2NaOH(aq) -> NaClO(aq) + NaCl(aq) + H2O(l)

Question 31

State the equation for the thermal decomposition of calcium carbonate.

Answer 31

CaCO3(s) -> CaO(s) + CO2(g)

Question 32

State the eqaution for the reaction between CaO and HCl

Answer 32

CaO(s) + 2HCl(aq) ->CaCl2(aq) + H2O(l)

Question 33

State the eqaution for the reaction between Ca(OH)2 and HCl

Answer 33

Ca(OH)2(s) + 2HCl(aq) -> CaCl2(aq) + 2H2O