Zadanie 2d
Acid deposition forms when oxides of sulfur dissolve in water in the atmosphere. Write an equation for sulfur(VI) oxide reacting with water to produce an acid.
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Acid deposition forms when oxides of sulfur dissolve in water in the atmosphere. Write an equation for sulfur(VI) oxide reacting with water to produce an acid.
All the species in the titration are almost colourless except MnO4−, which is intensely purple. The spinach extract, however, is coloured green by chlorophyll. (i) State the colour change at the end point. (ii) Outline how adding distilled water to the…
State the class of error that always shifts the results of an experiment in the same direction.
The end point was reached after 3.0 ± 0.1 cm3 of titrant had been run in. (i) Calculate the percentage uncertainty in this titre. (ii) Suggest one change to the procedure that would lower the percentage uncertainty of a single titration, apart from…
The result is roughly 30 times higher than the iron content of spinach given in reference tables (as a percentage by mass). Suggest one reason, apart from human error, for so large a difference.
A gas sample gave the experimental results below. Which expression gives the molar mass of the gas, in g mol−1? Ideal gas constant R = 8.31 J K−1 mol−1, PV = nRT A. B.…
Halogenoalkanes form a homologous series. (i) Outline the meaning of homologous series. (ii) State the preferred IUPAC name of each of the two compounds shown. (iii) State which of the two compounds contains a chiral carbon atom and identify that carbon atom…
Identify the reagents for each step.
(i) Identify the type of reaction that takes place in step 1. (ii) Sketch the mechanism of the reaction in step 1, using curly arrows to show the movement of electron pairs. (iii) Identify the products formed from the reaction of propan-1-ol and propanoic acid…
Iron is extracted in a blast furnace by reducing iron(III) oxide with carbon monoxide. Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) Calculate the percentage atom economy for the production of iron by this reaction. Use section 1 of the data booklet.