How to Calculate Species Concentrations in a 0.010 M Solution of NaN3?

  • Thread starter Thread starter lha08
  • Start date Start date
  • Tags Tags
    Acids
AI Thread Summary
To calculate the concentrations of species in a 0.010 M solution of sodium azide (NaN3), it is essential to recognize that NaN3 dissociates into Na+ and N3- ions. The N3- ion can further react with water, establishing an equilibrium with the weak acid hydrazoic acid (HN3) and its conjugate base. The dissociation constant (Ka) for HN3 is given as 1.9 x 10^-5, which will be used to determine the concentrations of HN3 and N3- at equilibrium. The initial concentration of N3- is 0.010 M, and the changes in concentration due to the equilibrium reaction should be calculated to find the final concentrations of all species. Understanding these dissociation and equilibrium concepts is crucial for solving the problem accurately.
lha08
Messages
158
Reaction score
0

Homework Statement


Soldium azide, NaN3 is sometimes added to water to kill bacteria. Calculate the concentration of all species in a 0.010 M solution of NaN3. The Ka value for hydrazoic acid, HN3 is 1.9X10^-5.

Homework Equations





The Attempt at a Solution


I'm sort of confused because in the beginning i know that i have to separate NaN3 into its component elements..so in this case..NaN3-->Na+N3? or is it NaN3-->Na+3N?
 
Physics news on Phys.org
NaN3 is a salt of a weak acid HN3.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Chemistry Understanding how to calculate pH of a buffer solution
Replies
2
Views
1K
Calculate the pH of a 0.20 M solution of iodic acid (HIO3).
Replies
5
Views
8K
Titration Exam Question 1: Calculating Concentration of Undiluted Nitric Acid
Replies
3
Views
3K
Chemistry How do you calculate moles to neutralise oxalic acid?
Replies
1
Views
2K
How Do You Calculate NaCH3COO Concentration and Predict pH at Equivalence Point?
Replies
4
Views
3K
Finding mixture concentration using Beer's Law
Replies
3
Views
13K
Calculate the concentration (in M) of Cl- ions in solution C
Replies
2
Views
4K
Calculating H3O+ Concentration for Acetic Acid Solution | Ka = 1.8 x 10-5
Replies
2
Views
2K
Vinegar Concentration Calculation: % HC2H3O2 in a Diluted Solution
Replies
1
Views
2K
How Do You Calculate the Equilibrium Constant for a Weak Acid in Water?
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top