SPM Chemistry 2017 (Q5)

Question

5 . Industrial waste water containing heavy metal cations should be treated before being released into the river or drainage system. A sample of industrial waste water is taken and analysed for the presence of heavy metal cations. Diagram 4 shows the flow chart of the chemical tests for two ions that are being identified in the industrial waste water.

Air buangan industri mengandungi kationlogam berat sepatutnya dirawat sebelum dilepaskan ke sungai atau sistem perparitan. Satu sampel air buangan industri diambil dan dianalisis untuk mengetahui kehadiran kation logam berat. Rajah 4 menunjukkan carta alir bagi ujian kimia untuk dua ion yang dikenal pasti dalam air buangan industry.

(a) What is the meaning of cation?

Apakah maksud kation?

 

(b) Based on Test 1,

Berdasarkan Ujian 1,

(i) name the yellow precipitate Q formed

Namakan mendakan kuning Q yang terbentuk

(ii) what will happen if the precipitate is heated and cooled again?

Apakah yang akan berlaku sekiranya mendakan tersebut dipanaskan dan disejukkan semula?

(iii) write the ionic equation for the formation of precipitate Q

Tulis persamaan ion untuk pembentukan mendakan Q

(iv) if 0.0002 mol of potassium iodide solution is added to the industrial waste water, calculate the mass of precipitate Q formed.

Sekiranya 0.0002 mol larutan kalium iodida ditambahkan kepada air buangan industri tersebut, hitung jisim mendakan Q yang terbentuk.

[Molar mass of Q = 461]

[Jisim molar Q = 461]

 

(c) Based on Test 2, identify R ion.

Berdasarkan Ujian 2, kenal pasti ion R.

 

(d) The industrial waste water may contain Copper (II) ions. Describe briefly a chemical test to confirm the presence of  ions.

Air buangan industri mungkin mengandungi ion kuprum(II). Huraikan secara rangkas ujian kimia untuk mengesahkan kehadiran ion C

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

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