Electrical Activitiy in the Heart Control of the basic heartbeat is?myogenic, which means the heart will beat without any external stimulus This intrinsic rhythm means the heart beats at around 60 ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.7.5 Tests for Water Tests for Water Water can be identified using a chemical test and/or a physical test Chemical test for water An...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.7.4 Tests for Anions Tests for Anions Testing for Anions Table Exam Tip When it comes to qualita...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.7.3 Tests for Cations Tests for Cations Metal cations in aqueous solution can be identified by the?colour?of the precipitate they f...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.7.2 Flame Tests Flame Tests Metal ions produce a?colour?if heated strongly in a flame Ions from?different?metals produce?different?colours...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.7.1 Tests for Gases Tests for Gases Many reactions in the lab produce?gases?which then need to be tested The table below indicates ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.6.6 Practical: Prepare Copper(II)Sulfate Practical: Prepare Copper(II)Sulfate Aim: To prepare a pure, dry sample of hydrated copper(II) sulfate c...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.6.5 Prepare a Soluble Salt Prepare a Soluble Salt A soluble salt can be made from the reaction of an acid with an insoluble base During th...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：2.6.4 Bases Bases What makes a base act like a base? Bases are substances which can neutralise an acid, forming a salt and water The term?ba...
