tugasan regulasi metakognisi 1a (minggu...

352

Lampiran B

Semua maklumat adalah sulit untuk tujuan kajian sahaja.

Tugasan Regulasi Metakognisi 1A (Minggu kedua)

Relative Molecular Mass, Molar Mass, Molar Volume and Avogadro Constant

Jisim Molekul Relatif, Jisim Molar, Isi padu Molar dan Pemalar Avogadro

(30 minit)

Nama :______________________

Tingkatan:____________________

MAKLUMAT UNTUK CALON

Instruction

1. Students are required to read carefully the instruction in this question paper.

Calon dikehendaki membaca dengan teliti arahan di dalam kertas soalan ini.

2. This question paper consists of 5 question.

Kertas soalan ini mengandungi 5 soalan.

3. Answer all questions.

Jawab semua soalan.

4. Voice your thinking process from the beginning until the end while solving the questions

below,

Suarakan proses pemikiran anda dari pemulaan hingga akhir ketika menyelesaikan soalan-

soalan berikut,

1. Calculate the relative molecular mass of

a. Bromine, Br2

………………………………………………………………………….

b. Glucose, C6H12O6

…….……………………………………………………………………..

c. Benzoic acid,C6H5COOH

……………………………………………………

[Relative atomic mass; H, 1; C, 12; O, 16; Br, 80]

2. Calculate the relative formula mass of

a. Magnesium oxide, MgO

……………………………………………………………

b. Aluminium nitrate, Al(NO3)3

………………………………………………………………………………………..

c. Hydrated sodium carbonate. Na2CO3.10H2O

……………………………………………………………..

[ Relative atomic mass; H, 1;C, 12; N, 14;O, 16; Na, 23; Mg, 24; Al, 27]

3. Find the number of moles of the following given mass [ Na, 23; K, 39, O, 16;N, 14]

a. 57.5 g of sodium, Na

…………………………………………………………………….

b. 4.04 g of potassium nitrate, KNO3

……………………………………………………………………..

4. Calculate the volume of the following gases at STP. [Molar volume 22.4 dm3 mol

-1 at STP and

24 dm3 mol

-1 at room temperature]

(a) 0.25 mol oxygen gas

………………………………………………………………………

(b) 2.5 mole of chlorine gas

………………………………………………………………………..

353

5. A closed container contains 3.6 dm3 of hydrogen gas at room temperature. Find

(a) The number of moles of hydrogen gas.

(b) The number of hydrogen molecules in the container.

[Molar volume 22.4 dm3 mol-1 at STP and 24 dm

3 mol

-1 at room temperature, Pemalar

Avogadro =6.02 x1023

]

Lampiran B

Semua maklumat adalah sebagai sulit untuk tujuan kajian sahaja.

Tugasan Regulasi Metakognisi 1B (Minggu keempat)

Topic: Empirical Formula and Molecular Formula

Tajuk: Formula Empirik dan Formula Molekul

(30 minit)

Nama :______________________

Tingkatan:____________________


Instruction






Jawab semua soalan

4. Voice your thinking process from the beginning until the end while solving the empirical

formula and molecular formula for the questions below,

Suarakan proses berfikir anda dari permulaan hingga akhir ketika menyelesaikan soalan

formula empirik dan formula molekul bagi soalan di bawah

1.The information below is regarding of unsaturated hydrocarbon X,

Based on the information of the unsaturated hydrocarbon X

(i) Determine the empirical formula X

(ii) Determine the molecular formula X

2. A compound contains 12.77 % carbon, 2.13 % hydrogen and 85.10 % bromine by mass

(a) Find the empirical formula of the compound

(b) Given that the molar mass of the compound is 188 gmol-1

. Determine the molecular

formula.

[Relative atomic mass; H, 1; C,12; Br, 80]

3.

Carbon 85.8%

Hydrogen 14.2%

Relative molecular mass =70

Relative atomic mass of H=1 and C=12

354

Figure 1

Table 2 shows the result of the experiment of determine the molecular formula of magnesium

oxide as the set up of apparatus in Figure 1

Material Mass /g

Crucible + lid

Crucible + lid + magnesium ribbon

Crucible + lid + magnesium oxide

23.70

25.50

26.68

Table 2

Based on the above results in Table 2,

(i) Calculate the mass of magnesium used and the mass of oxygen that has reacted with it.

(ii) Calculate the mole ratio of magnesium atoms to oxygen atom that has reacted.

(iii) Determine the empirical formula of magnesium oxide.

Lampiran B


Tugasan Regulasi Metakognisi 1C (Minggu keeenam)

Topic:Moleular Formula and Ionic Formula

Tajuk: Formula Molekul dan Formula Ionik

(30 minit)

Nama :______________________

Tingkatan:____________________


Instruction






Jawab semua soalan





Lid

Crucible Magnesium

ribbon

Heat

355

1. Write the chemical formula of each compounds below,

Tuliskan formula kimia setiap sebatian kimia berikut,

(i) Calcium carbonate :………………………..

(ii) Potassium sulphate:……………………….

(iii) Aluminium hydroxide:……………………..

(iv) Lead (II) iodide :………………………

(v) Iron (II) bromide :………………………

(vi) Sodium nitrate :…………………….

(vii) Ammonia :……………………

(viii) Sulphuric acid :……………………

(ix) Tetrachloromethene :………………………

(x) Carbon dioxide :……………………….

2. State the names of each compound according IUPAC system.

Nyatakan nama setiap sebatian berikut mengikut system IUPAC

(i). FeCl2 :………………………………………………..

(ii). HCl :……………………………………………….

(iii). CuSO4 :……………………………………………….

(iv). FeCl3 :……………………………………………….

(v). KMnO4 :………………………………………………..

(vi). Mg(OH)2 :……………………………………………….

Lampiran B


Tugasan Regulasi Metakognisi 1D (Minggu kelapan)

Topic:Chemical Equation and Stoichiometry Problem

Tajuk: Persamaan Kimia dan Masalah Stoikiometri

(30 minit)

Nama :______________________

Tingkatan:____________________


Instruction






Jawab semua soalan





1. Write a balance chemical equation for each of the following reactions

(i) When solid lead (II) carbonate is heated strongly. It decomposes into solid lead(II)

oxide and carbon dioxide is released.

………………………………………………………………………………

356

(ii) Nitrogen gas reacts with hydrogen gas to produced ammonia gas.

………………………………………………………………………………

(iii) Solid calcium oxide dissolves in hydrochloric acid, producing calcium chloride and

water.

………………………………………………………………………………

2. The following equation shows the decomposition of potassium chlorate(V) by heat.

(i) Write the balance the chemical equation

………………………………………………………………………………

(ii) Based on the balanced, find the volume of oxygen produced at room condition from

the decomposition of 24.5 g of potassium chlorate(V).

[Relative atomic mass: O, 16; Cl,35.5; K,39. Molar volume; 24 dm3mol

-1 at room

conditions]

………………………………………………………………………………

3. The following equation shows the reaction between sodium and water

2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g)

(i) How many moles of sodium will react with 5 moles of water?

……………………………………………………………………

(ii) Find the mass of sodium needed to produce 3.01 x 1023

hydrogen molecules.

[Relative atomic mass: Na, 23; Avogadro constant; 6.02 x 1023

mol-1

]

……………………………………………………………………………….

357

Jawapan Tugasan Regulasi Metakognisi 1

No.

Soalan

Tajuk Tugasan Jawapan Regulasi Metakognisi

1 Jisim molekul Relatif

(Tugasan Regulasi

Metakognisi 1A)

1. (a) 160

(b) 180

(c) 122

2. (a) 40

(b) 213

(c) 286

Merancang 1

Merancang 2

Merancang 4

Merancang 6

2 Mol dan Jisim molar

(Tugasan Regulasi

Metakognisi 1A)

3. (a) 2.5 mol

(b) 0.04 mol

Merancang 4

Merancang 6

3 Mol, isipadu gas, dan

bilangan zarah. (Tugasan

Regulasi Metakognisi

1A)

4.(a) 5.6 dm3

(b) 56 dm3

5.(a) 0.16 mol

(b) 9.6 x1022

molekul

Merancang 4

Merancang 6

4 Formula empirik dan

Formula Molekul

(Tugasan Regulasi

Metakognisi 1B)

1.C5H10

2. C2 H4Br2

3. MgO

Merancang 1

Merancang 2

Merancang 4

Merancang 6

Menganalisis 2

(Menjawab formula

empirik)

Merancang 4

Merancang 6

(Menjawab Formula

molekul)

5 Formula Kimia (Tugasan

Regulasi Metakognisi 1C)

1.(i)CaCO3

(ii)K2SO4

(iii)Al(OH)3

(iv)PbI2

(v)FeBr2

(vi) NaNO3

(vii) NH3

(viii) H2SO4

(ix) CCl4

(xi) CO2

2.(i) Iron(II) chloride

(ii)Hydrochloric acid

(iii)Copper(II) sulphate

(iv) Potaassium(vii) manganate

(v) Magnesium hydroxide

Merancang 5

Merancang 6

6 Persamaan Kimia

(Tugasan Regulasi

Metakognisi 1D)

i) PbCO3 →PbO + CO2

ii) N2 +3H2 →2NH3

iii) CaO +2HCl →CaCl2 + H2O

2 (i) KClO3 →KClO + O2

3(i) 5 mol

Merancang 5

Merancang 6

7 Masalah Stoikiometri

(Tugasan Regulasi

Metakognisi 1D)

2(ii) 4.8 dm3

3(ii) 23 g

Menganalisis 1

Merancang 2

Merancang 4

Menganalisis 2

Merancang 6

tugasan regulasi metakognisi 1a (minggu...

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