KARTKÓWKA
Authored by Rozkka Rozkka
Chemistry
12th Grade
Used 2+ times
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5 questions
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1.
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1 min • 1 pt
25 gramów chlorku potasu rozpuszczono w 175 gramach wody. Oblicz stężenie procentowe uzyskanego roztworu. Wynik podaj w procentach masowych z dokładnością do pierwszego miejsca po przecinku.
2.
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1 min • 1 pt
60dm3 bromowodoru (HBr) rozpuszczono w warunkach normalnych w 2dm3 wody (gęstość wody 1g/cm3). Oblicz stężenie procentowe roztworu.
3.
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1 min • 1 pt
Rozpuszczalność azotanu(V) potasu w temp. 60 C wynosi 110g/100g H2O. Oblicz, ile gramów azotan(V) potasu znajduje się w 440g nasyconego roztowu.
4.
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1 min • 1 pt
W temp. 25oC przygotowano roztwór A, wprowadzając 400g azotanu(V) potasu do 150g wody destylowanej. Rozpuszczalność azotanu(V) potasu w temp. 25oC wynosi 80g/100g H2O. Roztwór A ochłodzono do temp. 10oC. Rozpuszczalność KNO3 w temp. 10oC wynosi 50g/100g H2O. Oblicz masę wykrystalizowanej soli. Wynik podaj w gramach z dokładnością do liczb całkowitych.
5.
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1 min • 1 pt
Ile moli wodorotlenku potasu KOH potrzeba do przygotowania 100 gramów 25% roztworu?
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