I already posted this question 2rd time now someone didn\'t answer the whole thi

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I already posted this question 2rd time now someone didn't answer the whole thing this is a 2rd refund please just answer all parts:

You are required to answer all parts of the question. Our professor gave it as you see it as a single question, so to save to getting a refund and posting again just please.

I know the rule is 1 question at a time in material science at our university this is a single question!!

And correctly clear writting please.

it would be a pain for me to separate them, since I have a fair bit of them.

And finally please do not write on a piece of paper then take a single photo with your mobile phone its going to be blured we can't see it use a photo copier. otherwise take multiple close up photos if mobile is all you have.

H2H20 RATIO CCMCO2 RATIO -700 400 CO CO2 RATIO H20 RATIO king point A boiling poi hing point cxide TEMPERATURE C Fig relates to question 7. (c)) LE 2.1 Table 1 Noble Active Standard Electro otive Fe Potenti es (Reductio Rencti Clas 2e 2CI 2H20 CPH PL No, 4H NO 2H2O H2O ing". HE22 2H3O 4 2e' 21I+ 2e PU 2H20 2H20 2e PH I 14) 3e M2 d Playsio Table 1 Crelates to questions 7- CdO & 8. Cd) Potenti Standard Potential. (volts vs. SHE -498 --1.358 229 1.118 +0.957 0,82 +0.799 0,799 +0.771 +0.401. +0.342. +0.15 -0.126 -0.138 -0,277 -0,403 -0.413 -0,447 744. -0.762 828 662 2.372 2,931

Explanation / Answer

a) Alumina is mostly and commercially prepared using Bayers process utilizing Bauxite. Basic processes take place -

i) Miling - Bauxite is washed and crushed to reduce the size of particles and increase the surface area.

ii) Desilication - Removing high levels of Silica impurity from bauxite.

iii) Digestion - Hot caustic soda solution is used to dissolve the aluminium-bearing minerals in the bauxite to form a sodium aluminate supersaturated solution.

iv) Clarification - Also known as settling. Separate the solids from pregnant liquor via sedimentation.

v) Precipitation

vi) Evaporation

vii) Classification

viii) Calcination - 2Al(OH)3 Al2O3 + 3H2O

b) The morphology of microstructures changes after the T6 heat treatment. The irregular eutectic phase gets converted into fine spheroidized Si particles uniformly distributed in the Al matrix which significantly improves the mechanical properties.

c) Zn2+ + 2 e- ---> Zn eo = -0.762 v

Cr3+ + 3 e- ---> Cr eo = -0.744 v

eZn = -0.762 + (0.059/2) log (0.7) = -0.7667

eCr = -0.744 + (0.059/3) log (0.1) = -0.7637

Hence, Zn will be corroded.

d) Pitting corrosion and crevice corrosion.

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