Jika 38 gram MgSO4.XH2O dipanaskan, akan dihasilkan 20 gram garam anhidrat (Mr MgSO4 =120, H2O=18) . Harga X diatas adalah ....

SENYAWA HIDRAT

Quiz
•
Chemistry
•
10th Grade
•
Medium
dian lisdiana
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 246 gram kristal magnesium sulfat MgSO4. xH2O dipanaskan sehingga terbentuk kristal MgSO4 sebanyak 120 gram, menurut reaksi: MgSO4. xH2O(s)→MgSO4(s) + xH2O(g)
Rumus senyawa kristal tersebut adalah .... (Ar Mg = 24; S = 32; 0=16)
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3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pada pemanasan kristalterusi (CuSO4 x H2O) terjadi pengurangan massa dari 24,90 menjadi 15,90 gram sesuai :CuSO4 x H2O --> CuSO4 x H2O. Tentukan rumus kristal terusi tersebut! (Ar Cu =63, S = 32, O = 16, H = 1)
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4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pada reaksi dehidrasi Na sulfat terhidrat: Na2SO4.xH2O → Na2SO4 + x H2O. Jika 11,6 gram Na2SO4.xH2O dipanaskan akan terbentuk Na2SO4 anhidrat sebanyak 7,1 gram. Jadi molekul air kristal yang terkandung adalah … (Ar H = 1, O = 16, Na = 23, S = 32)
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5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika 38 gr MgSO4.xH2O dipanaskan akan memperoleh 20 gr MgSO4. Harga x dalam kristal MgSO4.xH2O adalah ….
A. 3
B. 4
C. 5
D. 6
E. 7
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 8,6 gram garam hidrat dipanaskan hingga semua air kristalnya menguap dan membentuk 6,8 gram CuSO4. Jika Ar Ca = 40, O = 16, S = 32, dan H = 1, maka tentukan rumus garam hidrat tersebut!
A. CuSO4.2H2O.
B. CuSO4.3H2O.
C. CuSO4.4H2O.
D. CuSO4.5H2O.
E. CuSO4.6H2O.
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebanyak 10 gram senyawa hidrat besi (II) sulfat (FeSO4.xH2O) dipanaskan sehingga semua air kristalnya menguap. Massa zat padat yang tersisa adalah 5,47 gram. Bagaimana rumus senyawa hidrat tersebut?
A. 9
B. 8
C. 7
D. 6
E. 5
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