Practise

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2730 questions · page 105 of 137 · choose a topic above to narrow them down

SA-AC-EQ-0021 markL2 StandardCalculatorKc expressions

The units of

K_c

for

\mathrm{N_2+3H_2\rightleftharpoons2NH_3}

are

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SA-AC-EQ-0031 markL2 StandardCalculatorLe Chatelier

For an exothermic forward reaction, increasing temperature

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SA-AC-EQ-0041 markL2 StandardCalculatorLe Chatelier

Adding a catalyst to an equilibrium mixture

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SA-AC-EQ-0052 marksL2 StandardCalculatorKc calculations

For

\mathrm{H_2+I_2\rightleftharpoons2HI}

at equilibrium:

[\mathrm{H_2}]=0.10

[\mathrm{I_2}]=0.10

[\mathrm{HI}]=0.70

mol dm⁻³. Calculate

K_c

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SA-AC-EZ-0023 marksL2 StandardCalculatorProduct quantities

A current of 2.00 A passes through CuSO₄(aq) for 965 s. Calculate the mass of copper deposited (g).

A_r

Cu 63.5, F = 96 500.

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SA-AC-EZ-0042 marksL2 StandardCalculatorCharge and Faraday

Calculate the Avogadro constant (×10²³ mol⁻¹) from F = 96 500 C mol⁻¹ and e = 1.60 × 10⁻¹⁹ C.

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SA-AC-G2-0031 markL2 StandardCalculatorReactions

Magnesium reacts with steam to produce

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SA-AC-G2-0041 markL2 StandardCalculatorSolubility and uses

Which hydroxide is the most soluble?

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SA-AC-G2-0051 markL2 StandardCalculatorSolubility and uses

Which sulfate is the least soluble?

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SA-AC-G7-0031 markL2 StandardCalculatorHalide reactions

Which silver halide is insoluble in concentrated ammonia?

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SA-AC-G7-0041 markL2 StandardCalculatorHalide reactions

Concentrated sulfuric acid added to solid sodium bromide produces

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SA-AC-G7-0051 markL2 StandardCalculatorHalide reactions

The smell of bad eggs when conc. H₂SO₄ is added to a solid halide indicates

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SA-AC-G8-0021 markL2 StandardCalculatorThermal stability

Thermal stability of group 2 carbonates increases down the group because the cation

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SA-AC-G8-0031 markL2 StandardCalculatorThermal stability

Heating magnesium nitrate produces

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SA-AC-G8-0042 marksL2 StandardCalculatorThermal stability

Calculate the mass (g) of CO₂ released when 8.40 g of MgCO₃ (

M_r

84.0) fully decomposes.

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SA-AC-GA-0023 marksL2 StandardCalculatorIdeal gas equation

A gas occupies

250\ \text{cm}^3

120

kPa and

25\,^\circ

C. Calculate the number of moles. (

R=8.31

)

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SA-AC-GA-0041 markL2 StandardCalculatorReal gases

Real gases behave most like ideal gases at

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SA-AC-GB-0022 marksL2 StandardCalculatorEntropy

Calculate ΔS for

\mathrm{N_2+3H_2\rightarrow2NH_3}

S

(J K⁻¹ mol⁻¹): N₂ 192, H₂ 131, NH₃ 193.

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SA-AC-GB-0051 markL2 StandardCalculatorGibbs

A reaction with ΔH negative and ΔS positive is

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SA-AC-HA-0021 markL2 StandardCalculatorReactions

2-bromopropane with NaOH in hot ethanol mainly forms

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