
Topljivost ,koncentracija, i koligativna svojstva
Quiz
•
Chemistry
•
4th Grade
•
Easy
Marko Hrgar
Used 17+ times
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6 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
20 g saharoze (Mr(C12H22O11)=342) otopi se u 260 g vode. Izračunajte molalnost otopine u mol/ kg.
- 2 boda
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Kolika je, u g dm−3,masena koncentracija 12 %-tne vodene otopine octene kiseline, CH3COOH,
čija je gustoća 1,015 g cm−3?
- 2 boda
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
Koncentrirana sumporna kiselina ima maseni udio w(H2SO4) = 96 % i gustoću 1,83 g cm-3.
Izračunajte množinsku koncentraciju u mol/dm3 sumporne kiseline u koncentriranoj sumpornoj kiselini.
- 2 boda
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Iz otopine kalijevog permanganata (KMnO4) množinske koncentracije 0,5 mol/dm3 treba pripremiti
500 ml otopine možinske koncentracije 0,01 mol/dm3.
a) Koliki volumen početne otopine kalijevog permanganata treba uzeti za pripremu razrjeđene otopine?
- 2 boda
b) Koliki volumen vode je potrebno dodati za pripremu ove otopine?
- 1 bod
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Otopina kalijeva permanganata množinske koncentracije 0,01 mol L−1 pripremljena je otapanjem 0,158 g kalijeva permanganata u destiliranoj vodi. Koliki je volumen odmjerne tikvice koja je pritom korištena?
- 2 boda
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Topljivost neke soli povećava se zagrijavanjem. Kakva će otopina nastati zagrijavanjem zasićene otopine? Zaokruži točan odgovor.
a) ostat će zasićena otopina b) nezasićena
c) prezasićena otopina
- 1 bod
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