How to Excel in Chem p3

8/3/2019 How to Excel in Chem p3

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HOW TO EXCEL IN


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There are 3 questions :

1. Q1 : Experiment is given2. Q2 : Experiment is given3. Q3 : Plan an experimet


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1 a. Diagram is givenQ : State the observations

What can you observe from thediagram given? ( using all your 5senses )

i. The blue spot formedii. The container becomes hotiii. Hiss sound can be heard


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1 b. Q : State the inferencesGive reasons for the observations you have

statedi. The blue spot is formed because reason ..ii. The container becomes hot because

reason ..iii. The hiss sound can be produced because

reason ..


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1 c Q : State the variables :Manipulated variable (MV):

Substances that need to be changedResponding variable (RV) :Effects on the changes to MVConstant variable (CV) :Substances/time/temperature that isconstant


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1 d Q : State the hypothesisA : When the MV , the RV or vice versa

1 e Q : State the operational definitionWhat to define matter / process of responding variable (RV)A : Responding variable is .

Rusting of iron is Presence of blue spot is .


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2 a Q : State the reading measurementA :Readings with correct decimal point

and unitBurette : 2 d.p ( 0.00 cm 3 , 20.56 cm 3)Voltmeter : Depends on voltmeter used

1 decimal oint 2 decimal oint


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2 b Q : Construct the table based on thedata

Quantity / Unit Quantity / Unit Quantity / UnitVoltmeterreading / V


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2 c Q : Calculationi. Neutralisation : M a Va = a

Mb Vb b

ii. 3 steps rule : 1. no. of mole2. ratio from the equation3. calculate what it asks


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2 d Q : Classify the substancesA : Based on facts

Monoprotic acid Diprotic acid


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3. Q : Situation is given. You have toplan an experiment and onlyanswer what the questions asks


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i. Problem statement (3M)A : Does the MV affects/depends

on RV?

ii. Hypothesis (3M)A : When MV , RV or vice versa


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iii. Variables (3M)Manipulated variable (MV):Substances that need to be changedResponding variable (RV) :Effects on the changes to MVConstant variable (CV) :

Substances/time/temperature that isconstant


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iv Apparatus (3M)A : Measuring tools with volume

i.e 250 cm 3 beaker, burette, 250 cm 3 conical flask

v Materials (3M)

A : Chemical solutions / substances withvolume and concentrationi.e 1.0 mol dm -3 of 25 cm3 Silver nitrate

solution


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vi Procedure (3M)A : Correct procedure with sequence

Active and passive sentences can beaccepted

vii Tabulation of data (2M)Quantity / unit Quantity / unit

Let this empty Let this emptyYou just plan theexperiment, not running

it, so no results included


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Form 41. Structure of Atom :

Exp : Determination of melting and boilingpoint of naphthalene2. Chemical Formula and Equation :

Exp : Determination of empirical formula of magnesium oxide and lead(II) oxide

3. Periodic Table :Exp : Chemical properties of Group 1, and 17


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4. Electrochemistry : ***Exp : i. Electrochemical cell ***

ii. Voltaic cell5. Acids and Bases :

Exp : Neutralisation**6. Salts :

Exp : Preparation of insoluble salt (doubledecomposition)7. Manufacture of Substances :

Exp : Strength of alloy


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1. Rate of Reaction :Exp : Rate of reaction on concentration***,size of reactants ***, catalyst

2. Carbon compounds :Exp : Vulcanisation of rubber **3. Oxidation and Reduction :

Exp : i. Rusting of iron**

ii. Determination of Carbon inReactivity series4. Thermochemistry :

Exp : i. Heat of combustion***

ii. Heat of displacement***


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Prepared by : Maslina Binti Maserom

How to Excel in Chem p3

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