• Explain why an ionic compound must be melted or dissolved in water in order to conduct electricity. • Recall that the metal (lead) is produced at the hode and the non-metal (bromine) is produced at the anode. • Predict the name of the products of the
IGCSE 20163 - *0123456789* Caridge International Examinations Caridge International Ge Describe and explain one method of preventing rusting. method explain why this method works [2] (d) Iron can be recycled. Explain two
explain why alkenes are classified as unsaturated hydrocarbons 4.26 Naming alkenes understand how to draw the structural and displayed formulae for alkenes with up to four carbon atoms in the molecule, and name the unbranched-chain isomers
Explain why isotopes of the same element have the same chemical properties but different physical properties. View Answer Assuming 3.9g of the ferrous salt was dissolved in 100cm3 of distilled
Each and Every Material Of chemistry for IGCSE revison and ebooks + past paper+ tricks to learn easy Acids have a pH of less than 7. Bases have a pH of more than 7. When bases are dissolved in water, they are known as alkalis. Salts are made when an acid
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
(c) Name one metal that does not react when it is added to dilute hydrochloric acid. (1) (d) Suggest two substances, other than acids, that can be used in reactions to compare the
Q5.€€€€€€€€€ The apparatus shown in the diagram was used to investigate the rate of reaction of excess marble chips with dilute hydrochloric acid, HCl. Marble is calcium carbonate, formula CaCO 3. The salt formed is calcium chloride, CaCl 2. (a)€€€€ Write a
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GCSEJanuary 2012 QP - Paper 1C Edexcel Chemistry IGCSE___。 PMT Write your name here Surname Other names …
However, the question is not very well set, as in the question is not specific enough. Let me assume that you are following the GCE O-Level Syllabus, and then try to solve this question. When an organic compound reacts with oxygen, i believe it meant coustion and the two products will be carbon dioxide (assuming sufficient amount of air available) and water vapour.
A soft, silvery-white, corrosion-resistant metal. It is the most abundant metal in the earth’s crust as it makes up 8% of the crust and it is the third most abundant element after oxygen and silicon. Bauxite ore (Al 2 O 3.xH 2 O) is the major source of aluminium till date which is a …
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.
1/5/2018· Calcium is a metal, sulfur is not, thus ionic bonds form creating a giant ionic lattice. They will want you to say something like: "Strong electrostatic forces of attraction between positive and negative ions, which require a large amount of energy to
3 Why is chlorine such an important part of the treatment? 4 A fluoride compound may be added to water. Why? 5 Some water can be harmful even after treatment. Explain. 6 You need a drink of water – but there is only dirty river water. What will you do to !!!
4:18 explain why cracking is necessary, in terms of the balance between supply and demand for different fractions (c) Alkanes 4:19 know the general formula for alkanes 4:20 explain why alkanes are classified as saturated hydrocarbons
When hydrochloric acid reacts with any carbonates/hydrogen carbonates the products formed are metal chloride , water and carbon dioxide.Since HCl decomposes salts of weaker acids. So the equation of the reaction between calcium carbonate and HCl i
In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
b) Explain why calcium has a higher melting point than strontium. Calcium''s delocalised electrons are closer to the ion than in strontium [1] It therefore has stronger metalic bonding. [1] c) Magnesium is used in fireworks. It reacts rapidly with oxygen, burning
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