Lab queries Essay

Findings: В

PartВ I: В ReactionВ betweenВ ironВ andВ oxygenВ

AppearanceВ ofВ steelВ woolВ afterВ 20В minutesВ FromВ (relatively)В shinyВ metalВ stripsВ toВ notВ­soВ­shinyВ stripsВ thatВ areВ stainedВ withВ dark, В reddishВ­brownВ stuff. В В В

PartВ II: В DecompositionВ ofВ hydrogenВ peroxideВ

AppearanceВ ofВ potatoВ andВ hydrogenВ peroxideВ combination: В LotsВ ofВ white, В foamyВ bubblesВ aroundВ theВ potatoВ slices. В

DayВ 2В

Observations: В

PartВ III: В ReactionВ betweenВ zincВ andВ aceticВ acidВ

AppearanceВ ofВ pennyВ inВ vinegarВ afterВ 30В minutes: В PrettyВ darkВ coloured. В QuiteВ hardВ toВ seeВ Lincoln'sВ headВ orВ theВ Memorial. В В

PartВ IV: В ReactionВ betweenВ bakingВ sodaВ andВ vinegarВ

DescriptionВ ofВ whatВ happenedВ whenВ theВ bakingВ sodaВ andВ vinegarВ wereВ combinedВ ImmediatelyВ beganВ foamingВ upВ andВ overflowingВ fromВ theВ bowl. В IВ alsoВ madeВ aВ ziplocВ bagВ explodeВ too. В В В

QuestionsВ andВ conclusions: В

PartВ I: В ReactionВ betweenВ ironВ andВ oxygenВ

1 . WriteВ aВ balancedВ equationВ forВ theВ reactionВ betweenВ ironВ andВ oxygen. В В

4FeВ +В 3O2 —> В 2Fe2O3В В

2 . ClassifyВ theВ reactionВ thatВ occurredВ betweenВ theВ ironВ andВ oxygen. В ApplyВ thisВ reactionВ toВ aВ realВ­worldВ situation. В

It'sВ oxidation. В OxygenВ oxidizesВ fromВ FeВ toВ Fe3+. В AsВ forВ aВ realВ­worldВ situation, В well, В rustingВ isВ aВ realВ­worldВ application. В В

PartВ II: В DecompositionВ ofВ hydrogenВ peroxideВ

1 . WriteВ theВ balancedВ equationВ forВ theВ breakdownВ ofВ hydrogenВ peroxide. В

В 

2H2O2 —> В 2H2OВ +В O2В

2 . WriteВ aВ balancedВ equationВ forВ anotherВ decompositionВ reaction. В В

DecompositionВ forВ copperВ carbonate: В CuCO3В в†’В CuOВ +В CO2В В

PartВ III: В ReactionВ betweenВ zincВ andВ aceticВ acidВ

1 ) WriteВ theВ balancedВ equationВ forВ theВ reactionВ betweenВ zincВ andВ aceticВ acid. В В

Zn(s)В +В 2CH3COOH(aq) —> В Zn(OOCCH3)2(aq)В +В H2(g)В В В

2 . ClassifyВ theВ reactionВ betweenВ zincВ andВ aceticВ acidВ andВ explain, В inВ generalВ terms, В whatВ happensВ duringВ thisВ typeВ ofВ reaction. В

TheВ reactionВ that'sВ happeningВ isВ aВ oxidationВ­reductionВ chemicalВ reaction, В alsoВ knownВ asВ aВ...

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