b) i) Calculate the number of moles of sodium ions In an aqueous solution of 2.63 g of Na,CO,.i) When 5.06 g of Iron reacted completely with 10.65 g of dry Chlorine gas, an Iron chloride wasformed. Deduce the equation for the reaction.c) The molar mass of a volatile liquid can be obtained by converting a weighed amount of it into vapourand measuring its volume. When 0.135 g of a volatile liquid was injected into a gas syringe at 90 °C, itfoimed S6 cm' of vapour at atmospheric pressure.State one assumption made to obtain the molar mass of the liquid from such data.ii)Deduce the molar mass of the liquid if the molar gas constant is 8.314 IK'mor.iii)If some of the liquid evaporated after weighing, what effect will this have on the experimentalvalue of the molar mass of the liquid?

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b) i) Calculate the number of moles of sodium ions In an aqueous solution of 2.63 g of Na,Co, ii) When 5.06 g of Iron reacted completely with 10.65 g of dry Chlorine gas, an Iron chloride was formed. Deduce the equation for the reaction. w .....

b) i) Calculate the number of moles of sodium ions In an aqueous solution of 2.63 g of Na,Co, ii) When 5.06 g of Iron reacted completely with 10.65 g of dry Chlorine gas, an Iron chloride was formed. Deduce the equation for the reaction. w .....

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 98AP

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

b) i) Calculate the number of moles of sodium ions In an aqueous solution of 2.63 g of Na,CO,.
i) When 5.06 g of Iron reacted completely with 10.65 g of dry Chlorine gas, an Iron chloride was
formed. Deduce the equation for the reaction.
c) The molar mass of a volatile liquid can be obtained by converting a weighed amount of it into vapour
and measuring its volume. When 0.135 g of a volatile liquid was injected into a gas syringe at 90 °C, it
foimed S6 cm' of vapour at atmospheric pressure.
State one assumption made to obtain the molar mass of the liquid from such data.
ii)
Deduce the molar mass of the liquid if the molar gas constant is 8.314 IK'mor.
iii)
If some of the liquid evaporated after weighing, what effect will this have on the experimental
value of the molar mass of the liquid?

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