8. Use the activity series to write a balanced chemical equation for the followi

Question

8. Use the activity series to write a balanced chemical equation for the following single-replacement reactions. Write NR if no reaction occurs. a. C12(g) + NaF(aq) b, Ca(s) + H2O(l) c. Pt(s) + H2SO4(aq) d. Al(s) + NiBr2(aq) 9. Write balanced chemical equations for the following double-replacement reactions. a. Ca(NO3)2 (aq) + K3 PO4(aq) (calcium phosphate precipitates) b, HI(aq) + Mg(OH)2(aq) c. Fes(s) + HCl(aq) (aqueous iron(II) chloride is one product) d. Cu Br2(aq) + KOH(aq) (copper(II) hydroxide precipitates)

Explanation / Answer

8)

a) Cl2 (g) + NaF (aq) ---------------> no reaction (NR)

because topmost halogen can replace downmost halogen . F2 can replace Cl2 but not Cl2 replace F2

b) Ca(s) + 2 H2O (l) -----------------> Ca(OH)2 (aq) + H2 (g)

c) Pt (s) + H2SO4 (aq) ---------------> NR

d) Al(s) + 3 NiBr2 (aq) ----------------------> 2 AlBr3 (aq) + 3 Ni (s)

9)

a) 3 Ca(NO3)2 (aq) + 2 K3PO4 (aq) ------------------> Ca3(PO4 )2 (s) + 6 KNO3 (aq)

b) 2 HI (aq) + Mg(OH)2 (aq) -------------------> MgI2 (aq) + 2H2O (l)

c) 2 FeS(s) + 4 HCl (aq) ------------------------> 2 FeCl2 (aq) + 2 H2S (g)

d) CuBr2 (aq) + 2 KOH (aq) ------------------> Cu(OH)2 (s) + 2KBr (aq)

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