a three step process is required in order to determine the concentration of NO3- in a basic solution: 1) Zinc metal reduces Nitrate ions into ammonia in basic environments 2) the ammonia is transferred to a solution with a known excess of HCl 3) the unreacted HCL is titrated with NaOH A) write a balanced equation for each process B) a 25.00ml basic Solution containing an unknown concentration of NO3- was treated with zinc metal, the ammonia gas from the reaction was reacted with a 50ml solution of 2.5*10^-3M of HCl, the remaining unreacted HCL was then titrated to the stochiometric point with 28.22ml of 1.5*10^-3 NaOH What is the molar concentration of NO3- in the original solution?

Principles of Modern Chemistry
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Chapter11: Solutions
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a three step process is required in order to determine the concentration of NO3- in a basic solution:

1) Zinc metal reduces Nitrate ions into ammonia in basic environments
2) the ammonia is transferred to a solution with a known excess of HCl
3) the unreacted HCL is titrated with NaOH

A) write a balanced equation for each process

 

B) a 25.00ml basic Solution containing an unknown concentration of NO3- was treated with zinc metal, the ammonia gas from the reaction was reacted with a 50ml solution of 2.5*10^-3M of HCl, the remaining unreacted HCL was then titrated to the stochiometric point with 28.22ml of 1.5*10^-3 NaOH
What is the molar concentration of NO3- in the original solution?

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