Visible evidence of a chemical reaction

Visible evidence of a chemical reaction

 

 

(A) Na2CO3(s) + HCl(aq)

(B) Zn(s) + HCl(aq)

(C) Ba(NO3)2(aq) + Na2SO4(aq)

(D) FeCl3(aq) + KOH(aq)

(E) NH4Cl(aq) + HCl(aq)

 

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(A) Na2CO3(s) + 2HCl(aq) → 2NaCl(aq) + CO2(g) + H2O(l)

---> CO2 기체 발생 (기포 발생)

( 참고: 알짜이온반응식. HCl + Na2CO3 https://ywpop.tistory.com/7126 )

 

 

(B) Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

---> H2 기체 발생 (기포 발생)

( 참고: 알짜이온반응식. Zn + HCl https://ywpop.tistory.com/12564 )

 

 

(C) Ba(NO3)2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaNO3(aq)

---> BaSO4 침전 발생 (white)

( 참고: 용해도 지침 https://ywpop.tistory.com/2942 )

 

 

(D) FeCl3(aq) + 3KOH(aq) → Fe(OH)3(s) + 3KCl(aq)

---> Fe(OH)3 침전 발생 (rust red)

 

 

(E) NH4Cl(aq) + HCl(aq) → no rxn

 

 

 

[키워드] FeCl3 + KOH + FeCl3, Ba(NO3)2 + Na2SO4 + Ba(NO3)2