Chemistry 11: Types of Reactions – Practical Lab

Experiment #1: – Balance: 4Fe + 3O2 = 2Fe2O3

– Reaction Type: Combustion (C)

– Qualitative Observation:  Iron (steel wool) burned very brightly.

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Experiment #2: – Balance: 2C4H10 + 13O2 = 8CO2 = 10H2O

– Reaction Type: Hydrocarbon Combustion (C)

– Qualitative Observation: Flame colour was blue and coming out of the butane lighter.

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Experiment #3: – Balance: H2O2 = H2 + O2

– Reaction Type: Decomposition (D)

– Qualitative Observation: Yellow foam was bubbling.

Experiment #4: – Balance: Cu2 + 2AgNO3 =Cu(NO3)2 + 2Ag

– Reaction Type: Single Replacement (SR)

– Qualitative Observation: Copper wire is changing to grey colour.

Experiment #5: – Balance: 2KI + Pb(NO3)2 = 2KNO3 + PbI2

– Reaction Type: Double Replacement (DR)

– Qualitative Observation: Turn into bright orange (yellow) colour.

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Experiment #6: – Balance: 2NaOH + H2SO4 = NaSO4 + H2O

– Reaction Type: Acid Base (AB)

– Qualitative Observation:Blue litmus paper + Sodium Hydroxide (NaOH) = still blue.; Blue litmus paper + Sulphuric acid (HSO4) = turned pink.;  Blue litmus paper +Sulphuric acid (HSO4)+ Sodium Hydroxide (NaOH) = still blue.

Red litmus paper + Sodium Hydroxide (NaOH) = turned blue.;Red litmus paper + Sulphuric acid (HSO4) = still pink.; Red litmus paper +Sulphuric acid (HSO4)+ Sodium Hydroxide (NaOH) = still pink.

FN10 sugar

Many foods contain sugar. But products that aren’t made by buying and making ingredients themselves have a lot of sugar in them than you might imagine. It takes a few cups instead of a spoon or two. It even goes into sauces like ketchup. These sugars are not a bad food. However, eating too much sugar is harmful to the body. So one of the reasons why people’s stomach sticks out is lots of sugar. So in the future, check the label on the back of the product and try to reduce sugar.