Physical Chemistry

We are given with,   Molarity = 0.001 M   Volume = 100 ml = 0.1 L   Number of moles of H2SO4 =  Molarity*Volume = 0.001 M*0.1 L = 0.0001 mole   Dissociation of sulphuric acid occurs as: H2SO4 ⟶ 2H+ + SO42-   From the above equation, 1 molecule H2SO4 given 1 SO42- ion   then, […]

30% w/v H2SO4 means 30 g H2SO4 in 100 ml solution.   Mass of H2SO4 = 30 g Density of H2SO4 = 1.05 g/ml Volume of H2SO4 = Mass/Density = (30 g)/(1.05g/ml) = 28.57 ml   Volume of solution = 100 ml Density of solution = 1.5 g/ml Mass of solution = Volume*Density = (100 ml)*(1.5 g/ml) = 150

Question: If E° for copper electrode is +0.34 V, how will you calculate its emf value when the solution in contact with it is 0.1 M in copper ions? How does emf for copper electrode change when concentration of Cu2+ ions in the solution is decreased? Solution: The emf of an electrode when dipped in

Molar conductivity increases with increase in volume and when volume increases the concentration of solution decreases (because no.of ions in the solution decrease) which makes the solution dilute.   On dilution when concentration approaches zero, the molar conductivity is known as limiting molar conductivity.   In case of strong electrolytes the ionisation is easy and

Solution: Given, [A]=0.1 mol L-1, [B]=0.2 mol L-1, k = 2.0×10-6 mol-2 L2 s-1Rate =k[A][B]2 = (2.0x 10-6 ) x (0.1 mol L-1) x (0.2 mol L-1) 2 = 8.0 x 10-9 mol-2 L2  s-1. The concentration of A is reduced to  (0.1 – 0.06) = 0.04 mol L-1.Now according to the equation 1 mole of A reacts with 2 mole of B.  So, 0.04

Let x g of each gas is mixed.   Molar mass of ethane = 30 g/mol   Molar mass of hydrogen = 2 g/mol   Mole = Given mass/Molar mass   Moles of ethane = (x/30) mol   Moles of hydrogen = (x/2) mol     So, the fraction of total pressure exerted by hydrogen

Thermodynamics is the study of flow of heat between system and surrounding. It deals with  energy changes accompanying all types of physical and chemical processes. Thermodynamics  helps to lay down the criteria for predicting feasibility or spontaneity of a process, including a chemical reaction, under a given set of conditions. It also helps to determine

Q. Solution:

To find the pH of the resulting solution when pH of 20 ml of 0.2 M HNO3 mixed with 40 ml of 0.1 M Ba(OH)2, find the number of moles of H+ and OH– for each given compound. We know, Moles = Molarity x Volume Since, Ba(OH)2 on dissociation give 2 OH– ion while HNO3 give