Igcse chemistry Samenvattingen, Aantekeningen en Examens

Experiment for Diffusion? - correct answer 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? - correct answer 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over ...

IGCSE EDEXCEL CHEMISTRY (organic chemistry) NEWEST EXAM 2024 WITH ACTUAL QUESTIONS AND CORRECT VERIFIED ANSWERS|ALREADY GRADED A+

IGCSE Chemistry Written Exam 2024. State the method used to obtain sand from a mixture of sand and water - CORRECT ANSWER filtration State the method used to obtain solid copper sulfate from aqueous copper sulfate - CORRECT ANSWER crystallisation State the method used to obtain red food dye from a mixture of food dyes - CORRECT ANSWER paper chromatography State the method used to obtain water from salt water - CORRECT ANSWER simple distillation Draw a diagram to show equipment u...

IGCSE CHEMISTRY STUDY GUIDE EXAM 2024. State the name of the gas formed at the anode during the electrolysis sodium chloride solution. (Triple science only!) - CORRECT ANSWER chlorine State the name of the gas formed at the cathode during the electrolysis sodium chloride solution. (Triple science only!) - CORRECT ANSWER hydrogen The solution formed after the electrolysis sodium chloride solution was tested with the indicator phenolphthalein. The indicator turned pink. Explain this res...

IGCSE SINGLE SCIENCE CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+IGCSE SINGLE SCIENCE CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+IGCSE SINGLE SCIENCE CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

IGCSE SINGLE SCIENCE CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+IGCSE SINGLE SCIENCE CHEMISTRY EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

What is an electric current? - correct answer A flow of electrons or ions What is an electron? - correct answer A minute particle that possesses an electrical charge of minus one (-1) What is an ion? - correct answer An atom or group of atoms that carries a charge due to the loss or gain of one or more electrons What is a conductor of electricity? - correct answer A substance that allows electricity to flow through it What is an insulator? - correct answer A substance that does not a...

Alkali metals - Elements in the first group of the periodic table; very reactive with group 7 elements; reactivity increases going down the group Halogens - Elements in the seventh group of the periodic table; diatomic elements; very reactive with group one elements; reactivity increases going up the group Sublimation - A change directly from the solid to the gaseous state without becoming liquid Deposition - Change from a gaseous state directly to a solid Element - A pure substance ma...