Recently Active Physical Chemistry Questions

1. How much ammonia must be added to a 0.004 M Ag+ soln. to prevent the precip. of AgCl when [Cl-] reaches 0.001 M ? Ksp (AgCl) = 1.8 * 10 ^ -10 . Diss. const. for Ag(NH3)2 + = 6 * 10 ^ -8. 2. A conc. strong acid is added to ...

1)The water is electrolysed in a cell, hydrogen is liberated at one electrode and oxygen simultaneously liberated at the other. In a particular experiment hydrogen and oxygen so produced were collected together and the total ...

when equimolar quantities of acetic acid and ethanol are at 25 C, 1/3 of acetic acid remains unreacted as shown by titration with standard alkali.Calculate concentration equilibrium constant. ...

I3- can b formed but Cl3- cannot..? why? ...

What maximum volume of 3M KOH can be prepared from 1L each of 1M KOH and 6M KOH .... (1) By using water (2) Without using water ...

1)what do we mean by reversible electrodes.For example we say the quinhydrone electrode is reversible wrt H+ ions. why. 2)what is the use of metal-metal's insoluble salt-salt anion solution? 3)what happens in this cell and wh ...

does sodium acetate & dilute HNO3 make a buffer solution? ...

Compute the heat of formation of liquid methyl alchohol in kilo joule per mole using the following data. Heat of vaporisation of liquid methyl alcohol=38 kJ/mol. Heat of formation of gaseous atoms from the elements in their s ...

A slice of banana weighing 2.502g was burnt in a bomb calorimeter producing a temperature rise of 3.05 C. The combustion of 0.316g of benzoic acid in the same calorimeter produced a tempterature rise of 3.24 C. The heat of co ...

*Image* ...

0.722 g of bromide of an element A having atomic weight 91.2 in a series of reaction gives 1.32 g of AgBr. Find the valency of element A. Also,show the steps... ...

A plant virus is found to consist of uniform cylindrical particles of 150 angstrom in diameter and 5000 angstrom long. The specific volume of the virus is 0.75cm3/g.If the virus is considered to be a single particle, find its ...

What is the solubility for PbS including hydrolysis of ions (assume pH of the solution tobe equal to 7). Given that Ksp(PbS)=7x10^-29 Kb (Pb(OH))+=1.5x10^-8 Ka1 H2S=1.1x10^-1 Ka2 HS- = 10^-14 I got the concept but I just cant ...

*Image* ...

Two jars A and B of equal capacity contain 10g of oxygen and 10g ozone respectively.Is the number of molecules equal in both jars?Which jar has greater number of atoms?Write the equation governing both parts or find the anoma ...

By the way Who loves Schrodinger's wave Eqn here. I have a question, please help to solve. It certainly goes at most times above my head! Q1: Show that the angular wave number k for a non relativistic free particle of mass m ...

plz balance the following equations: 1)KMnO4 + FeSO4 + H2SO4->K2SO4 +MnSO4 + +Fe2(So4)3 + H2O [ by oxidation no. method ] 2) Cr2O7 + NO2- -> Cr3+ + NO3- [by half reaction method] ...

guys , in this thread i want u to share everything u know abt shapes of orbitals.... basically a type of discussion some questions also..... so plzz come on.... ...

1)For which of the following reversible reactions Kp may be equal to 0.5 atm and how? a)PCl5 ---------------> PCl3 + Cl2 b)N2 + 3H2 ---------> 2NH3 c)2NO2 ---------------------> N2O4 2)A 1 litre container contains 2 ...

1)In a solid AB of NaCl structure. A atoms occupy the corners of the cubic unit cell. If all the the corner atoms are removed then the formula of the unit cell, 2)The p type semiconductors is obtained when Si is doped with (a ...

Q1. ΔUo of combustion of methane is -X kJ/mol. The value of ΔHo is (a) =ΔUo (b) >ΔUo (c) <ΔUo (d) = 0 Q2. For an isolated system, ΔU=0. what will be ΔS ? (sign) Q3. What is the equation for Heat of formation (sta ...

Calculate the packing fraction of closed cylinders. ...

5.35 g of a salt ACl ( of weak base AOH) is dissolved in 250 ml of solution. The pH of the resultant solution was found to be 4.827. Find the ionic radius of A+ and Cl- if ACl forms CsCl type crystals having density 2.2 g/cc. ...

what is meant by positive and negative phase in an orbital *Image* the blue part in the figure is known as positive phase and orange part is known as negative phase.What do these signify with respect to struture?? do these ph ...

i hv a doubt abt the concept of gibbs energy can sm1 explain it in simple terms.... ...

1)The specific gravity of CCl4 vapour at 273K and 76 cmHg in grams/litres ? 2)A monoatomic gas, a diatomic gas and a triatomic gas are mixed, taking one mole of each, the Cp/Cv for the mixture is ? 3)One mole of an ideal mono ...

what is meant by FREE CHARGE on an ion? ...

A mixture of two gases A and B in the mole ratio 2:3 is kept in a 2 litre vessel. A second 3 litre vessel has the same two gases in the mole ratio 3:5. Both gas mixtures have the same temperature and same total pressure. They ...

I have a small doubt. suppose in a reaction of A4 B3 , A gains 3 e- and B loses 2 e- then what will be the n - factor of A4 B3 in that reaction ? i.e the ratio of Mol wt and equivalent wt ? and hence wat will be its euqivalen ...

There are n containers having volumes V, 2V, ......., nV. A fixed mass of a gas is filled in all containers connected with stopcock. All containers are at the same temperature if pressure of first container is P then What is ...