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Chemistry Homework Help => AP Chemistry => Topic started by: Harini on October 09, 2022, 01:59:55 PM

Title: Molarity?
Post by: Harini on October 09, 2022, 01:59:55 PM
I have attached the question below
   
Title: Re: Molarity?
Post by: chenbeier on October 09, 2022, 08:20:53 PM
Calculate the moles of the nitric acid. According the equation the half will be destroyed to NOx. So the half amount gives then the silver. With molar mass you will get mass.
Title: Re: Molarity?
Post by: uma on October 10, 2022, 11:14:22 AM
Quote from: Harini on October 09, 2022, 01:59:55 PM
I have attached the question below

Molarity = moles /volume in L
Use this equation to know the moles of HNO3.
Now one mole of HNO3 gives one mole H+ .
Planning ---> Mx V (L) moles of HNO3    ---> Moles  H+ ------> moles of Ag+ ------> grams of Ag
Title: Re: Molarity?
Post by: chenbeier on October 21, 2022, 05:08:56 PM
QuotePlanning ---> Mx V (L) moles of HNO3    ---> Moles  H+ ------> moles of Ag+ ------> grams of Ag

Should it be like this
Planning ---> Mx V (L) moles of HNO3    ---> Moles  H+ ------> 1/2 moles of Ag+ ------> grams of Ag

One half of the acid is used by the reduction to NOx.

Ag  + 2 H+ + NO3-  => Ag+ + H2O  + NO2




Title: Re: Molarity?
Post by: uma on October 21, 2022, 06:47:57 PM
Quote from: chenbeier on October 21, 2022, 05:08:56 PM
Should it be like this
Planning ---> Mx V (L) moles of HNO3    ---> Moles  H+ ------> 1/2 moles of Ag+ ------> grams of Ag

One half of the acid is used by the reduction to NOx.

Ag  + 2 H+ + NO3-  => Ag+ + H2O  + NO2
That's the planning and in planning we don't use numbers.
When students are going to solve it ,then they take molar ratios and molar masses vaules .
Values are not taken in planning.