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Trezur S. what is the complete balanced iconic equation for aluminum nitrate and sodium hydroxide are mixed in an aqueous solution and they react
1 Expert Answer
aluminum nitrate = Al(NO3)3 sodium hydroxide = NaOH Al(NO3)3(aq) + 3NaOH(aq) ==> Al(OH)3(s) + 3NaNO3(aq) ... balanced molecular equation Al3+(aq) + 3NO3-(aq) + 3Na+(aq) + 3OH-(aq) => Al(OH)3(s) + 3Na+(aq) + 3NO3-(aq) ... complete balanced ionic equation ************************************************************************************************************************ BONUS Al3+(aq) + 3OH-(aq) ==> Al(OH)3(s) ... balanced net ionic equation
Introduction
Sodium hydroxide is added to a cylinder of aluminum nitrate, precipitating out aluminum hydroxide. When additional base is added, the precipitate dissolves. The reactions can then be reversed with the addition of hydrochloric acid. The precipitate will reappear and then redissolve.
Equations
Al(NO3)3(aq) + 3NaOH(aq) → Al(OH)3(s) + NaNO3(aq)
Al(OH)3(s) + OH-(aq) → Al(OH)4-(aq)
Al(OH)4-(aq) + H+(aq) → Al(OH)3(s)
Al(OH)3(s) + 3H+(aq) → Al3+ (aq) + 3H2O(l)
To Conduct Demonstration:
- Turn on stir plate and add NaOH solution until Al(OH)3 precipitates.
- Add more NaOH until the hydroxide precipitate dissolves.
- Add HCl until the precipitate is visible.
- Continue to add HCl until the hydroxide is re-dissolved.
Safety
Goggles should be worn.
Reference:
Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry; 1983.
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