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Learning Log (30/9/2020) - Coggle Diagram
Learning Log (30/9/2020)
Q18.
Evaporate the filtrate(sodium chloride solution)
Dissolve the mixture in distilled water.
Filter the mixture and sand can be separated.
Q.19.(B)
Wrong direction of water flow
water should enter in the lower opening
The thermometer should be near the side-arm of the still hand
No anti-bumping granules
Q20.
Filter paper - tiny holes
(c) Sample (boiling tube, test tube, delivery tube)
(e) Golden yellow flame
Calcium compounds give a brick-red flame in the flame test.(Flame test for calcium)
Test for the presence of carbonate
Add dilute hydrochloric > if carbonate is present then it will turn limewater from colourless milky
Gas bubbles given out(carbon dioxide )
Calcium carbonate + dilute hydrochloric acid -> Calcium chloride + carbon dioxide [CaCO3(s) + 2HCI (hq) -> CaCI2 + CO2(g) + H2O(1) ]
Chapter 5 Atomic Structure
Isotope
Neutrons
Protones
Electrones
Elements
Metals - shiny solid : high (Hard, strong) -high destiny
Non-metals - Solid or gas (brittle) - low destiny
Semi-metals - metalloid - Silicon (can not conduct electricity expect when it's at high temperature )
Appearance : Boiling point/melting point
Metal is a good conductor of heat and electricity