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alenasabr
@alenasabr
April 2021
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помогите ХИМИЯ 8 класс СРОЧНО
две реакция
а)Ca->CaO->Ca(OH)2->Ca(NO3)2->CaSO4
в)Fe2(SO4)3->Fe(OH)3->Fe2O3->Fe2(SO4)3
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ВладимирЛенин
1)
2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + 2HNO3= Ca(NO3)2 + 2H2O
Ca(NO3)2 + K2SO4 = CaSO4 + 2KNO3
2)
Fe2(SO4)3 + 6KOH = 2Fe(OH)3 + 3K2SO4
2Fe(OH)3 >греем> Fe2O3 + 3H2O
Fe2O3 + 3H2SO4 = Fe2(SO4)3 + 3H2O
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Answers & Comments
2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + 2HNO3= Ca(NO3)2 + 2H2O
Ca(NO3)2 + K2SO4 = CaSO4 + 2KNO3
2)
Fe2(SO4)3 + 6KOH = 2Fe(OH)3 + 3K2SO4
2Fe(OH)3 >греем> Fe2O3 + 3H2O
Fe2O3 + 3H2SO4 = Fe2(SO4)3 + 3H2O