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Chemistry, 02.04.2021 14:00 angelaencinas90

Data Numele elevului Clasa a VIII-aLucrare de control nr. 2–Clasele principale de compuşi anorganiciVarianta 2Total 60pdin care acumulate: p, nota 1.(6p)Se dă şirul de substanţe: NO2, HClO3, FeCl2, NaOH, NiO, HF, Zn(OH)2, LiOH, Ag2SO4, P2O5. Selectează formulele următoarelor substanţe:a)oxizii acizi b)bazele insolubile c)aciziineoxigenaţi d)săruri oxigenate2.(6p)Scrie denumirea substanţelor:a)HBrb)MgF2c)Cu(OH)2d) N2O5e)K3PO4f)H2SO33.(24p)Completeaz ă ecuaţiile reacţiilor şi stabileşte coeficienţii. Indică tipul reacţiei. a) + ...FeO → FeCl2+ b) ...K2CO3+ ...BaCl→ ↓ + KClreacţie de ...c) ...Cu(OH)2Ct+ H2O↑d) ...NO + → NO2reacţie de ...e)...HBr+ ...Na2S → ...H2S↑ + reacţie de ...f)...Zn+ → ZnSO4... + ↑g) ...Ni2O3+ ... H2→ Ni+ reacţie de ...h) ...H2CO3 Ct +reacţie de ...i) ... Cu(NO3)2+ → + Cu↓4.(6p)Se dau substanţele:SO2, KNO3, MgCl2, BaO, Fe, H3PO4, C. Găseşte 3 substanţe care vor reacţiona cu NaOHşi scrie ecuaţiile reacţiilor. a) b) c) 5.(9p)Alcătuiește seria genetică din care face parte HNO3Scrie ecuaţiile reacţiilor ce corespund acestor transformări.1)2) 3) 6.(9p) Rezolvă problema:620g de fosforinteracţionează cu hidrogenul. Ce masă şi cecantitate de PH3se formează

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