Bobo Sneddon
New member
I am having some difficulty with the following titration problem:
To determine the amount of ammonium ion in a sample a chemist dissolved 0.375g of the sample in water, added 25.0 mM of 0.414 M sodium hydroxide solution and boiled the mixture to drive off all the ammonia formed.
NH4+(aq) + OH-(aq) --> NH3(g) + H20(l)
The hydroxide left over after all the ammonium ion had reacted required 21.2mL of 0.161 M hydrochloric acid for exact neutralization. Calculate the mass of ammonium ion in the original sample and hence the mass percentage ammonium ion in the sample.
To determine the amount of ammonium ion in a sample a chemist dissolved 0.375g of the sample in water, added 25.0 mM of 0.414 M sodium hydroxide solution and boiled the mixture to drive off all the ammonia formed.
NH4+(aq) + OH-(aq) --> NH3(g) + H20(l)
The hydroxide left over after all the ammonium ion had reacted required 21.2mL of 0.161 M hydrochloric acid for exact neutralization. Calculate the mass of ammonium ion in the original sample and hence the mass percentage ammonium ion in the sample.