German Abitur · Chemistry

General, Inorganic and Physical Chemistry

24 practice questions, each with the answer and an explanation.

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All 24 questions

What does the atomic number of an element tell you?
What is the value of the Avogadro constant?
What is the pH of a $0.01 mol/L$ solution of hydrochloric acid?
How many moles are in $36 g$ of water ( $M = 18 g/mol$ )?
Which equation is correctly balanced?
What is the volume of one mole of an ideal gas at standard conditions ( $0^{\circ} C$ , $1013 hPa$ )?
What is the oxidation number of manganese in $KMnO_{4}$ ?
What is the percentage by mass of oxygen in $CO_{2}$ ( $M (C) = 12$ , $M (O) = 16$ g/mol)?
Which electron arrangement does the sodium ion $Na^{+}$ have?
What is the pH of a $0.1 mol/L$ solution of acetic acid ( $K_{a} = 1.8 \cdot 1 0^{- 5}$ )?
At equilibrium, a reaction $A + B ⇌ C$ has $[A] = 0.2$ , $[B] = 0.5$ and $[C] = 0.4 mol/L$ . What is $K_{c}$ ?
Reaction A needs $25 mL$ of a $0.1 mol/L$ HCl solution, which is neutralised with a $0.05 mol/L$ NaOH solution. What volume of NaOH is needed?
How many electrons are transferred when one $MnO_{4}^{-}$ ion is reduced to $Mn^{2 +}$ in acidic solution?
In which direction does the equilibrium $N_{2} + 3 H_{2} ⇌ 2 NH_{3}$ shift when the pressure is increased?
What does a catalyst do in a chemical reaction?
The enthalpies of reaction are $Δ H_{1} = - 110 kJ/mol$ for $C \to CO$ and $Δ H_{2} = - 283 kJ/mol$ for $CO \to CO_{2}$ . What is…
For a reaction with $Δ H = + 40 kJ/mol$ and $Δ S = + 100 J/(mol\cdotK)$ at $300 K$ , what are $Δ G$ and the outcome?
How does the rate of a first-order reaction change when the concentration is doubled?
A first-order reaction has a half-life of $10$ minutes. What fraction of the starting amount remains after $30$ minutes?
What is the molar solubility of AgCl, given $K_{s p} = 1.8 \cdot 1 0^{- 10} mol^{2} / L^{2}$ ?
Using the standard potentials $E^{\circ} (Cu^{2 +} / Cu) = + 0.34 V$ and $E^{\circ} (Zn^{2 +} / Zn) = - 0.76 V$ , what is the voltage of a zinc–copper galvanic cell?
At which electrode does reduction take place in an electrolysis cell?
Which type of mixture is a buffer?
Which of these is a Brønsted base?

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General, Inorganic and Physical Chemistry

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