
Sieros rūgšis
Authored by Elvyra Ajauskaite
Chemistry
1st Grade
Used 2+ times

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20 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Apibūdinkite praskiestos sieros rūgšties savybes:
stiprus elektrolitas
reaguoja su metalais, esančiais elektrocheminėje
lentelėje iki vandenilio
sąveikaudama su geležimi, susidaro geležies (III) sulfatas
nereaguoja su atskiestu natrio chlorido tirpalu
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Kaip kinta rūgščių stiprumas grandinėje
H2S → H2SO3 → H2SO4?
mažėja
didėja
silpniausias - sieros vandenilis, stipriausias - sieros rūgštis
nekinta
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Nurodykite medžiagų formules, kurios reaguoja su praskiesta sieros rūgštimi, formules:
K2SO3
Na2SiO3
KNO3
Cu
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pažymėkite galimų reakcijų lygtis
K2SO4 + BaCI2 →
K2SO4 + NaCI →
K2SO4 + HCI →
K2SO4 + H2SO4 (konc.) →
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kokie metalai tam tikromis sąlygomis reaguoja su koncentruota sieros rūgštimi, bet nereaguoja su praskiesta sieros rūgštimi?
varis
geležis
aliuminis
sidabras
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sieros rūgštis gali susidaryti:
kai sieros oksidas (IV) ištirpsta vandenyje, kai nėra deguonies
dėl sieros rūgšties oksidacijos deguonimi
kai sieros oksidas (VI) ištirpsta vandenyje
dėl reakcijos tarp kalio sulfato ir vandenilio chlorido tirpalų
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nurodykite reakcijų schemas, kuriose reaguoja koncentruota sieros rūgštis:
Cu+ H2SO4 → SO2↑ + ............
Fe + H2SO4 → FeSO4 + ..........
Zn + H2SO4 → H2 + .........
KNO3 + H2SO4 → HNO3↑ +.........
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