Flashcards
Chemistry
Flashcards do conjunto (9)
- 1Are the following elements or compounds? Copper, Copper oxide, Zinc nitrate, Iron, Sodium, Sodium chlorideCopper: Element
Copper oxide: Compound
Zinc nitrate: Compound
Iron: Element
Sodium: Element
Sodium chloride: Compound - 2What type of reaction needs to occur to make copper (an element) into a compound?A chemical reaction
- 3What is the formula?Something which shows you which elements are in a compound. For example the compound magnesium oxide (MgO) contains magnesium and oxygen. The word equation is:
magnesium + oxygen = magnesium oxide - 4Is this a balanced symbol equation? Mg + O₂ = MgONo it should be 2Mg + O₂ = 2MgO
- 5What is a mixture?A mixture is like a compound but they can be easily separated by 4 different separation methods
- 6What is filtration?Filtration is the process of using a porous material to remove solids from water or solutions
- 7What is crystallisation?Crystallisation is the process by which a solid forms, where the atoms or molecules are highly organised into a structure known as a crystal.
- 8What is distillation?Distillation is the process of evaporation followed by condensation
- 9What is chromatography?Chromatography is a method for separating substances used to identify compounds and check for purity