![A water-treatment plant is designed to remove dissolved manganese (Mn2+) and iron (Fe from the water. The water is aerated to oxidize these reduced species and cause formation of a solid precipitate that can then be filtered out of the water. The reaction for Mn is If the [Mn2+] equals 25x10-6 M, pH is maintained at 7, temperature is 25°C, and the oxygen concentration is maintained at a constant value by blowiilibrated with the atmosphere into the solution, will be the reaction proceed forward as written? (Answer: YES!). To determine the order of the reaction and the rate constant, a laboratory experiment is conducted that yields the following results Time (min) Mn2M) 25 17.7 11.1 6.25 12 6. Is this reaction: a- first order b- second order c- zero order d- Third order](http://img.homeworklib.com/questions/c3e8a0f0-903f-11eb-9ff2-fb378024c01e.png?x-oss-process=image/resize,w_560)
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A water-treatment plant is designed to remove dissolved manganese (Mn2+) and iron (Fe from the water....
1. Hydrazine is used to remove dissolved oxygen from the water in water heating systems. N2H4(l) + O2(g) à 2H2O(l) + N2(g) What is the free energy changed observed when 1.00...
1. Hydrazine is used to remove dissolved oxygen from the water in water heating systems. N2H4(l) + O2(g) à 2H2O(l) + N2(g) What is the free energy changed observed when 1.00 mole of N2H4 is oxidized? (for hydrazine ∆G°f = 149.2 kJ/mol) What is the free energy change for the oxidation of 1.00 pound (454 g) of hydrazine? 2. Calculate the standard free energy change and equilibrium constant for the following reaction at 25 °C. 4Ag(aq) + O2(g) + 4H+(aq)...
BACKGROUND: Synthesis of Potassium Iron (III) Oxalate Hydrate Salt The iron(II) ions from Fe(NH4)2(SO4)2•6H2O will be precipitated as iron(II) oxalate. Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s) The su...
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
What are the desirable characteristics of a solvent to be used in the recrystallisation of a...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
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