ENTHALPY OF REACTION (HEss\'s LAwy DATA L reaction between hydrochloric acid and

Question

ENTHALPY OF REACTION (HEss's LAwy DATA L reaction between hydrochloric acid and sodium hydroxide The Recipes for preparation of 1.5 M solutions of HCl and NaOH a, weight of 15 M sodium hydroxide solution based on the volume prepared and the assumed density b. weight of 1.5 M hydrochloric acid solution based on the volume prepared and the assumed density c. weight of total solution 1.5 M HCI d. initial temp. of reactants to nearest 0.2 oC 1.5 M NaOH e. final temperature of mixture to nearest 0.2 oC difference in temperature between reactants and products (AT) to nearest 0.2 oC g. Joules of heat evolved (show method of calculation) h. write the net ionic equation for the reaction between hydrochloric acid and sodium hydroxide

Explanation / Answer

I) h) Reaction between HCl and NaOH is

HCl (aq) + NaOH (aq) --------------> NaCl (s) + H2O (l)

H+ (aq) + Cl- (aq) + Na+ (aq) + OH-(aq) ------------> NaCl (s) + H+(aq) + OH-(aq)

Net ionic equation is

  Cl- (aq) + Na+ (aq) ------------> NaCl (s)

II) h )

Reaction of calcium with water is

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

   Ca(s) + 2H+ (aq) + 2OH- (aq) -------------> Ca2+ (aq) + 2OH- (aq) + H2(g)

Net ionic equation is

    Ca(s) + 2H+ (aq) -------------> Ca2+ (aq) + H2(g)

III) h)

Reaction of calcium with HCl is

Ca(s) + 2HCl (l) -------------> CaCl2 (aq) + H2 (g)

Ca(s) + 2H+ (aq) + 2Cl- (aq) -------------> Ca2+ + 2Cl- (aq) + H2 (g)

    Net ionic equation is

     Ca(s) + 2H+ (aq) -------------> Ca2+ +  H2 (g)

1) a)

reaction between HCl and NaOH is

HCl (aq) + NaOH (aq) --------------> NaCl (s) + H2O (l)

H+ (aq) + Cl- (aq) + Na+ (aq) + OH-(aq) ------------> NaCl (s) + H+(aq) + OH-(aq)

Net ionic equation is

  Cl- (aq) + Na+ (aq) ------------> NaCl (s)

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