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A student has conducted an experiment to measure the conductivity of electrolyte
Y2SO4 and was found to be 0.147 Ω-1 m-1. This solution was prepared by reacting 23.50
mL of 0.012 mol dm-3 of H2SO4 and YOH that gives the total volume of reaction
mixture is 50 mL.
(a) Write the chemical equation for the reaction.
(b) Find the concentration of YOH
(c) Find the limiting molar conductivity of Y ion
A student has conducted an experiment to measure the conductivity of electrolyte
Y2SO4 and was found to be 0.147 Ω‒1 m‒1. This solution was prepared by reacting 23.50
mL of 0.012 mol dm‒3 of H2SO4 and YOH that gives the total volume of reaction
mixture is 50 mL.
(a) Write the chemical equation for the reaction.
(b) Find the concentration of YOH
(c) Find the limiting molar conductivity of Y ion
Liquid water and liquid sulfuric acid mix together to produce aqueous solution of sulfuric acid at 45C. Initially H2O(l) is at 25C temperature and 11kmol/h. H2SO4(l) is at 35C and 1.22kmol/h. Concentration of H2SO4(aq) is 35.7 wt%. Using concentration enthalpy chart, find the total heat needed to transferred during mixing operation.
The vapour pressure of water at 323k is 92mm Hg.18.1g of urea dissolved in 100g of water.calculate the lowering of vapour pressure?
The elements of period 2 of the periodic table (Li to Ne) show periodic trend in their properties
How do the following properties vary across the period (Li to Ne) ? Explain in each case
A : Atomic structure
Explanation
B : First ionisation energy
Explanation
The elements of period 2 of the periodic table (Li to Ne) show periodic trend in their properties
(i) What is meant by the term ‘periodic trend’?
A mixtureof ethanol (bp 78.50C) and water(bp 1000c) shows a positive deviation from Raoult´s law and forms an ayotropic mixture of boiling point 78.20C at a composition of 96% ethanol.
i)What is an azotropic mixture.
ii)Draw a well labeled diagram of the boiling point against composition of water-ethanol mixture.
Draw the Born-Haber cycle for NaCl and calculate its lattice energy.
Draw the resonance structures of carbonic acid.
Define “lattice energy”
Draw the “dot and cross” diagram of carbonic acid H2CO3
