DP Chemistry revision(Formulas)

To calculate moles of chemicals in solid-state

• Divide mass with molar volume

• Divide volume with molar mass

• Divide mass with molar mass

• Multiply mass with molar mass

To convert cm³ to dm³

• Multiply the value with 100

• Add the value with 1000

• Multiply the value with 1000

• Divide the value with 1000

Formula for calculating % yield

• (Actual yield ÷ theoretical yield) 100

• (Actual yield + theoretical yield) 100

• (Actual yield - theoretical yield) 100

• (Actual yield ÷ theoretical yield) 1000

Ideal gas law (general gas equation)

• P₁V₁T₂ = P₂V₂T₁

• PV = nRT

• T₁P₂ = P₁T₂

• T₁V₂ = T₂V₁

The concentration of a solution can be calculated using the formula

• Mole X Volume

• Volume ÷ Mole

• Volume ÷ Molar volume

• Mole ÷ Volume

Formal charges of Lewis structures can be calculated using the formula

• (number of valence electrons) – ½(Number of bonding electrons) – (Number of non-bonding electrons)

• (number of valence electrons) + ½(Number of bonding electrons) – (Number of non-bonding electrons)

• (number of valence electrons) – ½(Number of bonding electrons) + (Number of non-bonding electrons)

• (number of valence electrons) – (Number of bonding electrons) – ½(Number of non-bonding electrons)

Formula for calculating specific heat capacity

• Q = mc ÷ ∆T

• Q = mc∆T

• Q = mc - ∆T

• Q = mc + ∆T

Tags

NGSS.HS-PS3-4

Formula for calculating enthalpy change

• ΔH reaction = Σ(ΔHf ◦products) - Σ(ΔHf ◦reactants)

• ΔH reaction = Σ(ΔHf ◦products) + Σ(ΔHf ◦reactants)

• ΔH reaction = Σ(ΔHf ◦products) ÷ Σ(ΔHf ◦reactants)

• ΔH reaction = Σ(ΔHf ◦products) x Σ(ΔHf ◦reactants)

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Gibbs free energy calculation formula

• ΔG ⁰ = ΔH ⁰ + TΔS ⁰

• ΔG ⁰ = TΔH ⁰ - ΔS ⁰

• ΔG ⁰ = ΔH ⁰ ÷ ΔS ⁰

• ΔG ⁰ = ΔH ⁰ - TΔS ⁰

% error calculation formula

• [(Experimental value+Theoretical value)-Theoretical value] 100

• [(Experimental value-Theoretical value)Theoretical value] ÷100

• [(Experimental value-Theoretical value)÷Theoretical value] 100

• [(Experimental value x Theoretical value)-Theoretical value] 100