Please check the examination details below before entering your candidate information
Candidate surname Other names
Pearson Edexcel Centre Number Candidate Number
International
Advanced Level
Tuesday 5 May 2020
Afternoon (Time: 1 hour 20 minutes) Paper Reference WCH13/01
Chemistry .
International Advanced Subsidiary/Advanced Level
Unit 3: Practical Skills in Chemistry I
Candidates must have: Scientific calculator Total Marks
Ruler
Instructions
• Use black ink or black ball-point pen.
• centre
Fill in the boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 50.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You will be assessed on your ability to organise and present information, ideas,
descriptions and arguments clearly and logically, including your use of grammar,
punctuation and spelling.
• There is a Periodic Table on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end.
Turn over
P62586A
©2020 Pearson Education Ltd.
1/1/1/
*P62586A0116*
, Answer ALL the questions.
Write your answers in the spaces provided.
DO NOT WRITE IN THIS AREA
1 A white anhydrous crystalline solid A contains one cation and one anion.
Solid A was heated in a test tube and the following observations were made.
A brown gas was produced.
A glowing splint relit when placed in the mouth of the test tube.
A white solid remained in the test tube.
(a) Identify, by name or formula, the two gases formed.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
(b) Identify, by name or formula, the anion present in A.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
(c) A flame test was carried out on A and a green colour was observed.
Identify, by name or formula, the cation present in A.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
(d) Give the formula of solid A and the formula of the white solid formed on heating.
(2)
Solid A .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................................................. ........................................................................................... ................ . . . . . . . . . . . . . . . . . . . . .
White solid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................................ . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
2
*P62586A0216*
, (e) About 5 cm3 of an aqueous solution of A was placed in each of two test tubes.
Five drops of aqueous sodium hydroxide were added to one of the test tubes and
DO NOT WRITE IN THIS AREA
five drops of dilute sulfuric acid were added to the other.
In the table give the observations you would expect to make.
(2)
Addition of sodium hydroxide solution Addition of dilute sulfuric acid solution
(Total for Question 1 = 8 marks)
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
3
*P62586A0316* Turn over
Candidate surname Other names
Pearson Edexcel Centre Number Candidate Number
International
Advanced Level
Tuesday 5 May 2020
Afternoon (Time: 1 hour 20 minutes) Paper Reference WCH13/01
Chemistry .
International Advanced Subsidiary/Advanced Level
Unit 3: Practical Skills in Chemistry I
Candidates must have: Scientific calculator Total Marks
Ruler
Instructions
• Use black ink or black ball-point pen.
• centre
Fill in the boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 50.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You will be assessed on your ability to organise and present information, ideas,
descriptions and arguments clearly and logically, including your use of grammar,
punctuation and spelling.
• There is a Periodic Table on the back cover of this paper.
Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• Check your answers if you have time at the end.
Turn over
P62586A
©2020 Pearson Education Ltd.
1/1/1/
*P62586A0116*
, Answer ALL the questions.
Write your answers in the spaces provided.
DO NOT WRITE IN THIS AREA
1 A white anhydrous crystalline solid A contains one cation and one anion.
Solid A was heated in a test tube and the following observations were made.
A brown gas was produced.
A glowing splint relit when placed in the mouth of the test tube.
A white solid remained in the test tube.
(a) Identify, by name or formula, the two gases formed.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
(b) Identify, by name or formula, the anion present in A.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
(c) A flame test was carried out on A and a green colour was observed.
Identify, by name or formula, the cation present in A.
(1)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ .............. .. . . . . . . . . . . . . . . . . . . . . .
(d) Give the formula of solid A and the formula of the white solid formed on heating.
(2)
Solid A .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................................................. ........................................................................................... ................ . . . . . . . . . . . . . . . . . . . . .
White solid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................................ . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
2
*P62586A0216*
, (e) About 5 cm3 of an aqueous solution of A was placed in each of two test tubes.
Five drops of aqueous sodium hydroxide were added to one of the test tubes and
DO NOT WRITE IN THIS AREA
five drops of dilute sulfuric acid were added to the other.
In the table give the observations you would expect to make.
(2)
Addition of sodium hydroxide solution Addition of dilute sulfuric acid solution
(Total for Question 1 = 8 marks)
DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA
3
*P62586A0316* Turn over
