Recently Active Physical Chemistry Questions

2 liquids have boiling pt. as 80°c and 100°c resptly. Which liquid will have more vapour pressure at 80°c? plz xplain ur ans. quick reply is appreciated. ...

Air sample from industry heavily polluted with CO2 was analyzed.In one analysis,56L of air measured at NTP was passed through a 250mL of 0.025M NaOH solution where CO2 was absorbed completely.25mL of the above solution was th ...

An unknown compound A is composed of manganese and oxygen having 36.78%oxygen by weight.If 1.7g of A is heated in stream of hydrogen gas,water is formed in assosciation with 1.5g of B(MnxOy) Q1 Weight of water formed=____ ...

A compound AX2 reacts with another compound BY in a redox reaction.X is an element in AX2 with oxidation number +3.Y is an element in BY with oxidation number -2.In one of the products CX , X has oxidation number +1.The other ...

if all d species r in their std states wich of d follwin is d strongest oxidisin agent ? a)Br- b)Zn(2+) c)Co(+3) d)Fe(+2) i can do this q if i wer given d ECS ........bt no values r given so plez tellme d oncept 2 solve s ...

wich of d follwin statemnt bout spontaneous rxtion occurin in galvanic cell is true a)Eocell>0, delGo<0 Q<Keq b)Ecell>0, delG<0 Q<Keq ...

For a first order reaction 2A→Products what is [A] as a function of time? Does that coefficient 2 makes a difference? ...

Successive ionisation potentials of an element M are 8.3,25.1,37.9,259.3 and 340.1ev. The formula of its Bromide is _? ...

8.4g of nitrogen gas is sealed with 5g hydrogen gas in a flask and heated where the following equilibrium is established N2+3H2 [equil]2NH3 At equiilbrium reaction is 60% complete.The gaseous mixture at equilibrium is passed ...

Determine pH of a 5% solution obtained by adding 25mL 0.1M HCl to 50mL 0.1M KNO2 solution.Ka=7*10^(-4). ...

1.2g of a salt with their emperical formula KxHy(C2O4)z was dissolved in 50mL of water and its 10mL part reqd 11mL of 0.1M HCl solution to reach equivalene point.IN a separate titration 15mL of stock solution reqd 20mL 0.2475 ...

What is area under Cp/T versus T0 graph????????????????? where Cp =Heat capacity at constant volume T= TEmperature T0 = Absolute temperature ...

Determine molar solublity of AgSO4 in 0.25M Na2SO4 solution and determine the factor by which soolublity decreases when it is compared to solublity in pure water.Ksp=1.4*10-5 at 25°C ...

hw many grm moles of HCl will b required to prepare one litre of buffer solution (conatinin NaCN and HCl) of PH 8,5 usin .01 grm formula weight of NaCN ? Kdisso (HCN)=4.1*10^(-10) here is am method rite ph=pka+log ...

1.) the nodal plane in the pi bond of ethane is located in a) the molecular plane b) a plane perpendicular to the mol plane wich bisects the C-C σ-bond at right angle c) a plane parallel to mol plane d) a plane perpendicular ...

250ml of a sol. contains 2.65 grams of Na2CO3. 10ml of this sol. is added to "x" ml of water to obtain 0.001M Na2CO3 SOL. What is the value of"x" in ml ?? ...

The electronic conf. of a tripositive metal ion is [Ar]3d5.If it's mass no. is 60,the total no. of fundamental particles init's neutral atom is....??? ...

It gains heat, so its enthalpy increases. ...

Li+2 ion is hydrogenic and has a Lyman seriies at 740747cm-1,877924cm-1,925933cm-1 and beyond.Show tht the energy levels are of the form -R/n2 and find the value of R for this ion. Predict the wave no's of the two longest ...

The solublity product constant for Co(OH)3 is 1.6*10-44.What is the solublity of Co(OH)3 in a soluiton buffered at pH=8 ...

An ammonia ammonium chloride buffer has a pH value of 9 with[NH3]-0.25.By how much will the pH will change if 75 mL 0.1M KOH be added to 200 mL buffer solution.Kb=2*10-5 ...

An aqueous solution of methyl amine has pH value 10.64.How many grams of methyl amine are present in 100mL of the solution.Kb=4.4*10-4 ...

Ionic product of D2O is 1.33*10-15.For what value of pD will the solution be acidic? ...

Determine pH of a 5% aqueous solution of NaOCl(by weight).Density of solution is 1 g/cc.Ka=3*10-8 ...

The solublity of unknown salt MXn is 2*10-8M and its solublity product is 4.32*10-30.Formula of the salt is????? ...

Calculate pH of a 0.016M aqueous solution of Ca(CH3COO)2 .Ka=2*10-5 ...

A 0.1 M aqueous solution of acetic acid is being titrated against a 0.025M NaOH solution at 25°C.Determine pH at the end point if Ka of CH3COOH is 2*10-5 ...

Phenol is a weak acid used as a disinfectant.The pH of a 0.01M solution of a sodium phenolate is 11,what is pKa?? ...

Draw curves for the following titrations....... 1)Strong acid-Strong base 2)Strong acid -Weak base 3)Weak acid -Strong base ...

The auto ionization constant of liquid ammonia at -30°C is 10-33.Determine pNH2 of a 0.001M NH4Cl solution in iquid ammonia at -30°C ...