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Corrosion Experiment |
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Experiment 45 – Corrosion Aim: To observe how different chemical environments affect corrosion and to infer whether structural stress influences corrosion. Also, to predict whether copper or zinc can be used to protect iron from corrosion. ... Recorded the observations noting that the presence of ferrous ions meant that corrosion had occurred Part B 14. ... 1 Observations Test Solution pH Initial Observations Observations after 12 hrs Test with Fe(CN) Set1NaOH Base Clear, colourless solution No change -ve Na2Cr2O7 Neutral Clear, colourless solution Rust spots, no colour change -ve NaCl Neutral Clear, colourless solution Rust at bottom, thicker texture, colour change -ve HCl Acid Clear, colourless solution Gas evolution, nail shorter and fatter, no rust +ve Set IIKOH Base Clear, colourless solution Rust, colour change +ve Na2CO3 Base Clear, colourless solution Rust, colour change +ve KNO3 Neutral Clear, colourless solution No change -ve HNO3 Acid Clear, colourless solution Rust, colour change +ve Set IIINa3PO4 Base Clear, colourless solution No change -ve Na2C2O4 Base Clear, colourless solution No change -ve NaSCN Neutral Clear, colourless solution Orange ppt, rust at bottom, -ve H2SO4 Acid Clear, colourless solution, bubbles Bubbles +ve ControlsH2O Blue colour, therefore a +ve solution and there are ferrous ions present and corrosion has occurred FeSo4 +ve, therefore there are ferrous ions present and corrosion has occurred Petri Dishes: Data Analysis: 1. |
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Title: Corrosion Experiment
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