Recently Active Physical Chemistry Questions

find the solubility of PbSO4 ( K = 1.1 * 10-8 ) in 0.1 M aqueous solution of KNO3 help needed badly . thanks guys. ...

at isoelectric point, what is the pH? ...

Both ICl4- & ClF3 have 2 lone pairs of electrons, but the dipole moment of ICl4- is zero while that of ClF3 is not. Please explain ...

(1) Is CH3COOH amphiprotic? It has a conjugate base CH3COO- as well as a conjugate acid CH3COOH2+, so ideally shouldnt it be amphiprotic? (2) Is the strength of an acid/base and degree of ionisation the same? (3) ...

T1O2 (rutile) shows 6:3 coordination. The solid having rutile like structure among the following is - (a) ZnS (b) KCl (c) SnO2 (d) None of the above ...

At what approx. pH of the solvent, will the solublity of CH3COOAg would be least? ...

To what extent must a given solution containing 40mg AgNO3 per ml be diluted to yield a solution containing 16 mg AgNO3 per ml? ...

NEGATIVE ADSORPTION? WHICH 1 OF THE FOLLOWING IS A CASE OF NEGATIVE ADSORPTION? 1.ACETIC ACID SOLUTION IN CONTACT WITH ANIMAL CHARCOAL 2.DIL.KCl SOLUTION IN CONTACT WITH BLOOD CHARCOAL 3.CONC.KCl SOLUTION IN CONTACT WITH BLOO ...

Kp is 0.0529 at 26°C for the react. NH4HS===NH3 +H2S 0.092 mole of solid NH4HS is introduced into 2.46L of evacuated flask at 26°C A) cal. % of solid NH4HS decomposed B) find the no. of moles of NH3 to be added to reduce th ...

The diameter of the largest sphere that fis the void at the centre of cube edge of a BCC crystal of lattice parameter a, is? a)0.293a b)0.414a c)0.134a d)0.336a ...

A bottle contains 1 mol He(g) and second bottle contaisn 1 mole Ar(g) at the same temperature.At this temp. ,the rms of HE is 1477 m/s and of Ar is 467 m/s.What is the ratio of no. of HE atoms in 1st bottle to the no. of Ar a ...

in case of bi-molecular collisions we calculate the value of b(in volume correction )as 8Ï€r3/3 (for one molecule) can somebody give me the value of b in case of tri-molecular collision and tetra-molecular collision ...

please give some link on this or atleast take an example and explain . for 3 salts . no less no more. ...

CH3NH2 (.1 mole.KB=5*10-4)is added to .08 moles of HCL and the solution is diluted to one liter.The resulting hydrogen ion concentration will be ________________ ...

the titration curve for weak acid HA is shown.At which point in the titration is conc. of HA equal to conc. of conjugate base A?and WHY? *Image* ...

The graph shows titration curve for diprotic acid using standard NaOH soln Which of these is correct a)vOL A) represents 1st end point b)pH B) represents end pt at pH=7 c)pH D represents half neutralization pH that maybe ...

This reversible reaction is 1st order. *Image* Q1 Calculate rate constant for forward direction. Q2The concentration of reactant remaining after 1hr is? Q3Draw curve of concentration v/s time of A and B simultaneously. ...

A particular water sample has 131ppm CaSO4.What fraction of water must be evaporated in a container before solid CaSO4 begins to deposit.Ksp of CaSO4=9*10-6 ...

Steam is passed over hot carbon to attain equilibrium at 400K C(s) + H2O(g)<====>CO(g) +H2(g) The eq constant is K=1.34 and total pressure of eq mixture is 200kPa.What are mole fractions of all substances at equilibrium ...

0.85g sample of pyrites FeS2 was fused and sulphur oxidised to SO42-.The ppt. of BaSO4 weighed 1.43g.Whats % of pyrites in the ore? Ans43.22% ...

In a reaction at equilibrium x mole of reactant A decompose t ogive 1 mole of C and D.It was found that the fraction of A decomposed at eq is independent of conc. of A,then calculate X. ...

0.25g sample of MnO2 is dissolved in HCl soln. and distillate passed through iodine soln. .The iodine thus liberated reqd 50mL 0.11N thiosulphate soln. Calculate purity of MnO2. ...

Given that radius of: Ca=94pm o2-=146pm in a lattice Calculate thecoordination no. of the lattice ...

*Image* The following diagram shows vapour pressure curves for CH3F,CH3OH,CH3COOH,H2CO. Match the curve with corresponding compound ...

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*Image* Q1 Calculate activation energy for formation of P ? Q2 Calculate activation energy for formation of A? Q3 What is arrhenius eqn for backward reaction? ...

Why are there 2n tetrahedral and n octahedral voids for n lattice points? ...

To a 10 ml 1 M aqueous solution of Br2, excess of NaOH is added so that all Br2 changes to Br- and BrO3-. The resulting solution is freed from Br- by extraction and excess of OH- is neutralized by acidifying the solution. The ...

In NCERT Chemistry textbook, it says that AgBr shows both Frenkel and Schottky defects. Is this correct???? ...

For an hypothetical parallel I order reation, K1 and K2 are the rate constants A→B(K1) A→C(K2) if K1=2K2 the %yield of B is i am getting the eqn as -d[A]/dt=(d[B]+d[C])/dt is this correct and after that wat to do ... ...