Thermal decomposition of calcium carbonate | Resource | …
Insoluble calcium carbonate is being precipitated: Ca(OH) 2 (aq) + CO 2 (g) → CaCO 3 (s) + H 2 O(l) What does the colour change occurring when limewater is added tell you about the pH of the solution? Explain why the pH would be expected to have this value.
Question paper (Higher) : Paper 1 - June 2018
4 *04* IB/G/Jun18/8462/1H Do not write outside the 0 This question is about 2 box metals and metal compounds. 0 2 . 1 Iron pyrites is an ionic compound. Figure 1 shows a structure for iron pyrites. Figure 1 Determine the formula of iron pyrites. Use Figure 1.
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Important Question for Class 10 Science Acids, Bases, …
Important Question for Class 10 Science Acids, Bases, and Salts PDF will help you in scoring more marks.. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Acids Bases and Salts
IGCSE TEST (Ch. 2,3,4,5,6) Name Date 1 Winston Churchill, a British …
 (ii) Explain why it is necessary to use a mixture, alumina and cryolite, rather than just alumina.  (iii) Copper can be extracted by the electrolysis of an aqueous solution.Suggest why the electrolysis of an aqueous solution cannot be used to extract aluminium.
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Given the PES from the previous question, explain …
Given the PES from the previous question, explain why the ionization energy for the valence electrons of N e is higher than that of A r. A . N e has more protons than A r which requires more energy to remove the valence electron.
The Reactivity Series (solutions, examples, activities, …
Given a table of metal activity you can identify which metal will be displaced. The more active metal is oxidised to ions. The less active metal ion is reduced to the solid metal. Question: 1. What would occur when an iron nail is submerged in a zinc nitrate 2.
GCSE CHEMISTRY - Extraction of Metals - What is a Metal …
A metal above carbon in the reactivity series (potassium, sodium, lithium, calcium, magnesium and aluminium) can be extracted by electrolysis. Extraction of the metal from its ore involves reduction of the metal ions. Electrons are able to reduce any metal ion. metal
Edexcel AS Chemistry 1 - Structure and bonding …
1) Explain why HCl(g) is soluble in water. (2 marks) 2) Explain why the melting temp of Mg is higher than that of Na. (3 marks) 3) Mass spectrometer question: Explain how the atoms of the sample of sulphur are ionised. I know it has to do with the fact that the
Band Theory of Metals, Electronic Properties & Videos - …
It is evident from the figure, in case of metal, there is no separation between the bands. This helps the incited electrons to easily move from one orbital to another and hence metals are good conductors of electricity. In the case of semiconductors, there is a small
Inorganic Chemistry Questions and Answers | Study
Get help with your Inorganic chemistry homework. Access the answers to hundreds of Inorganic chemistry questions that are explained in a way that''s easy for you to understand.
IGCSE Chemistry Paper 6 Notes – prepIGCSE
filter (to obtain calcium carbonate) Wash dry weigh residue calculate percentage calcium carbonate; Mass of Calcium Carbonate/Mass of Toothpaste X 100 A solution of dilute sulfuric acid was electrolysed for 1 hour. Suggest why the pH of the solution
Download ICSE Class 10 Chemistry Important Questions
ICSE Class 10 Chemistry Important Questions to practice before the examination so that you can ace in the subject. It improves performance and the mistakes are also taken care. Chemistry is one such subject that requires a lot of revision. You understand the
Caridge IGCSE Chemistry: Coursebook with CD-ROM …
Explain why burning fossil fuels containing sulfur is harmful to the environment.    CIE IGCSE, June 2007, paper 2, q.1 part 5 22 A student collected some water from a polluted river. The
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Edexcel International GCSE Chemistry
Metal and metal salt used Average temperature rise in C Zn + CuSO 4 12.2 X + CuSO 4 8.3 X + ZnSO 4 0.0 Cu + ZnSO 4 0.0 Zn + XSO 4 2.7 Cu + XSO 4 0.0 Use these results to identify the more reactive metal in each of the following pairs. (2)
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Caridge International Examinations Caridge International …
(b) (i) Complete the genetic diagram below to explain why, in a human population, equal nuers of male and babies should be expected. parents phenotypes chromosomes gametes chromosomes and phenotypes of offspring XX and and male
Materials: Metals and Non-Metals Class 8 Extra …
Question 5. Explain the term ‘malleability’ with suitable examples. Answer: Malleability is the property of metals due to which they can be beaten into thin sheets. For example, if we beat or hammer any metal like aluminium, zinc, iron, copper, etc., it become
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0620_s09_qp_3 1. Loion Entry Codes As part of CIE’s continual commitment to maintaining best practice in assessment, CIE uses different variants of some question papers for our most popular assessments with large and widespread candidature.
IGCSE Chemistry: March 2016
A blog covering and explaining the Edexcel IGCSE Chemistry specifiion for the 2016 summer exams. If you are doing just double science, you do not need to learn the sf for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the …
The s Block Elements: Groups, Characteristics, Properties, …
Out of all the elements in the periodic table, the s block elements are the most known and used elements. Elements like calcium, sodium and potassium are all meers of the s block. I''m sure you have heard these names in your house. They are very useful
How can zinc be extracted by electrolysis? | Yahoo Answers
2013/5/22· Electrolysis of a solution of any salt dictates that, at the hode, the more reactive the metal is, the more it likes to stay as ions in the solution. So if it is more reactive than hydrogen, hydrogen bubbles off, if not, the metal will be deposited at the hode. At the anode, a halide or oxygen will bubble off. At least that''s what I know from my IGCSE book. Now the question is, in the