MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 520 off
USE CODE: MOB20

				   

Tritium,T(an isotope of H) combines with F to form a weak acid TF, which ionizes to give  T+, Tritium is radioactive and is BETA-emitter. A freshly prepared solution of TF has pT (equivalent of pH) of 1.5 and freezes at -0.372 degree celcius . If 600 ml of freashly prepared solution were allowed to stand for 24.8 years, CALCULATE:


(a) The ionization constant of  TF.


(b) The number of beta - particles emitted

7 years ago

Share

Answers : (2)

										

Hi


Tritium , symbol T or 3H, also known as Hydrogen-3 is a radioactive isotope of hydrogen. The nucleus of tritium (sometimes called a triton) contains one proton and two neutrons, whereas the nucleus of protium (the most abundant hydrogen isotope) contains one proton and no neutrons.


β decay (electron emission)







Beta decay



An unstable atomic nucleus with an excess of neutrons may undergo β decay, where a neutron is converted into a proton, an electron and an electron-type antineutrino (the antiparticle of the neutrino):


np + e + νe

While tritium has several different experimentally-determined values of its half-life, the NIST recommends 4,500±8 days (approximately 12.33 years).It decays into helium-3 by the reaction


 















31T  →  32He  e  νe


 


pH is defined as minus the decimal logarithm of the hydrogen ion activity in an aqueous solution. By virtue of its logarithmic nature, pH is a dimensionless quantity.


\mathrm{pH} = - \log_{10} a_ \mbox{H} = \log_{10} \frac{1}{a_ \mbox{H}}

where aH is the (dimensionless) activity of hydrogen ions.  


Ans 2:


pT = 1.5 , therefore [T+] = 10(-1.5) = 0.032 M


Half life for Tritium is 12.33 yrs, therfore aftr 24.8 yrs , its has had two half lives, hence its conc. .is c/4 = .032/4 = .008 M  .


Now calculate the no. of moles in 600 ml. hence one can calculate the no. of moles converted from initial conc and final conc.


 After this, we can see from the eq that fr one mole of Tritium decayed , one mole of Beta particle is emitted , hence we can find the no. of beta particles emitted by knowing the total moles converted.


 

7 years ago
										

Hi


An acid dissociation constant, Ka, (also known as acidity constant, or acid-ionization constant) is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for a chemical reaction known as dissociation in the context of acid-base reactions. The equilibrium can be written symbolically as:


HA is in equilibrium with A + H+,

where HA is a generic acid which dissociates by splitting into A, known as the conjugate base of the acid, and the hydrogen ion or proton, H+, which, in the case of aqueous solutions, exists as a solvated hydronium ion. In the example shown in the figure, HA represents acetic acid, and A the acetate ion. The chemical species HA, A and H+ are said to be in equilibrium when their concentrations do not change with the passing of time. The dissociation constant is usually written as a quotient of the equilibrium concentrations, denoted by [HA], [A] and [H+]:


K_a equals the equilibrium concentration of the deprotonated form A-, times the equilibrium concentration of H+, all divided by the equilibrium concentration of the acid AH. 
we have already calculated [T+], but we still need the conc of TF and F- , then only we can find Ka .
7 years ago

Post Your Answer

Other Related Questions on Physical Chemistry

what is meant by entropy..........................................................?
 
 
@ sharda entropy of a system is actually the measurement of degree of randomess ordisorderliness of a system . it is a thermodynamic property and represented by a letter S . the entropyof...
 
Umakant biswal 4 months ago
 
entropy is the sudden change in randomness of the system due to may be from exapnding, contracting, collision etc. small example → take a glass of water and Eno. eno prsesnt in packed...
 
cris gayle 4 months ago
 
entropy is the sudden change in randomness of the system due to may be from exapnding, contracting, collision etc. small example → take a glass of water and Eno. eno prsesnt in packed paper...
 
Vikas TU 4 months ago
In the chapter Solid State Class 12, how to classify any solid or elements on the basis of their bonds i.e. covalent bond, molecular bond etc ???
 
 
Depending upon the type of bonding present , Solids can be divided as : 1) Covalent Solids 2) Ionic solids 3) Molecular solids 4) Metallic solids
  img
Suraj Prasad 6 months ago
 
Ok , thats the same thing i told , u just need to see the configuration of examples . i am giving that below potassium sulphate – ionic solid tin – mettalic solid benzene – molecular (non...
 
Umakant biswal 6 months ago
 
@ shreyas On the besic of bond present there are no such classification as tetraphosphorous decosides , and aluminium phosphates . Besic of the bond there are 4 types of classification 1-...
 
Umakant biswal 6 months ago
what is the oxidation state of sulphur in H 2 S 2 O 8, Na 2 S 4 O 8 and Na 2 S 2 O 3.
 
 
@ bhavika in H2S2O8, since 2 oxygen is forming the peroxide linkage here , so, the o.n of sulpher will be +6 . and in the 2 nd case NA2S4O8 , in thaat case take sulpher o.n to be x after...
 
Umakant biswal 6 months ago
 
You no longer have to wait desperately for someone to help resolve your doubt. You can chat with IITians live, 24/7 (even at 3AM!) and get your doubt resolved instantly. Try the HashLearn...
 
Ankit 6 months ago
 
u need to remember that which structure have peroxide linkage and which structure have not , there are only some exception with peroxide linkage , go through the ncert redox reaction chapter...
 
Umakant biswal 6 months ago
the hybridization of phosphorus in PCl 5 (in solid state ) is 1)sp 3 2)sp 3 d 2 3)sp 3 d 4)both 1 and 2
 
 
sp3d is the right answer. In excited state, intermixing of a 3s, three 3p and one 3d orbitals gives five half filled sp 3 d hybrid orbitals, which are arranged in trigonal bipyramidal...
 
dolly bhatia one month ago
 
@ krishna option no 3 turns out to be the correct option , here , the orbitals are filled by electrons of five cl atom . there are 5 p-cl sigma bond , three in one plane and make an angle of...
 
Umakant biswal 3 months ago
 
i hope to no.3 because phosphours atom contain in last subshell is 5 electron and not contain a lone pair and here is 5 chlorine atom .then we add up eletron and we get a 10 and we devided...
 
sahabudin ali 2 months ago
 
It should be option 4 as PCl5 exists in [PCl4]+ and [PCl6]- in solid state....as in first case it is Sp3 and that in second it is Sp3d2
 
7 days ago
sir iam a iiit students in RAGIV GANDHI UNIVERSITY OF TECHNOLOGIES, there is a semister it infront of me in 10 days.i don’t know any thing about chemistry.it is a ncert syllubus.please send...
 
 
@ badugu they are ncert books topic , i am mentioning some imp chapter name below 1- COORDINATION COMPOUND ( PART 2 CHEMI ) 2- GENERAL PRINCIPLES OF ORGANIC CHEMISTRY ( 11TH 2ND PART ) 3-...
 
Umakant biswal one month ago
 
Dear Vijay, Go through these topics first as atmost importat ones: Aldehyde and Ketones Biomolecules Alcohols and ethers Coordination Compounds Solid states Electrrochemistry Solutions D and...
 
Vikas TU one month ago
 
@ badugu , kindly be specific in asking the ques , earlier u told that u have ncert syllabus , and i have given the chapters from ncert textbooks only . kindly conform which publication u...
 
Umakant biswal one month ago
How many unpaired electrons are present in superoxide ion?
 
 
But the answer is 3.. As in molecular orbital theory the unpaired electrons in oxygen molecule is 2.. It accepts 1 electron to form superoxide ion.. That electron instead of pairing with 2...
 
Suraj Singh 19 days ago
 
And now I am agree with my solution.. You should check it once.... .. And thanq for the concern... .....
 
Suraj Singh 19 days ago
 
It`s unfortunately wrong..................................... ................. NOť less than 100 char
 
Suraj Singh 19 days ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,000 off
USE CODE: MOB20

Get extra R 520 off
USE CODE: MOB20

More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details