Some examples from this set of practice questions
1.
Was passiert bei dem Vorgang der Elektrolyse?
Answer: Bei der Elektrolyse - gelangen die Anionen zur Anode - findet am Pluspol die Oxidation (Elektronenabgabe) statt - gelangen Kationen zur Kathode - findet am Minuspol die Reduktion (Elektronenaufnahme) statt - das geschieht durch elektrische Spannung
2.
Einheit und Formel der Stoffmenge n
Answer: Einheit: Mol n= N:NA n= V:Vm n= m:M z.B: 18g Wasser = 1 mol -->; g:mol
3.
Einheit und Formel der Masse m
Answer: EInheit: g m=M*n --; g:mol*Anzahl von Mol = g
4.
Einheit und Formel des Volumen V
Answer: Einheit: l (Liter) Vm*n Normbedingungen: Vm=22,4 l:mol Standartbedingungen: Vm= 24,5l:mol 2mol*24,5l:mol= 49l
5.
molare Masse M
Answer: g:mol ein mol eines Stoffes wiegt ... g --> g:mol M=m:n z.B. 80g:2mol = 40 g:mol 1 mol sind 40g
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