Semester 2 Exam
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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non metal atoms are … at attracting electrons
non metal atoms are GOOD at attracting electrons
non metal atoms are adept from stealing electrons from … atoms to complete their outer shell
non metal atoms are adept from stealing electrons from METAL atoms to complete their outer shell
metal atoms are usually used for … electrons
metal atoms are usually used for GIVING electrons
Define “Reactant”
The substance that takes part in a reaction and is the element that undergoes change during a reaction.
Define “Product”
The substance that is present at the end of a reaction - A substance that forms from the reaction
What is Calcium’s symbol?
Ca
What is Sodium’s symbol?
Na
A solution is acidic if it has…
more H+ ions
A solution is basic is it has…
more OH- ions
A solution is neutral is it has…
equal H+ and OH- ions
The universal indicator chart is used to…
estimate the pH levels of substances
When is an acid strong?
When it completely ionises in aqueous solutions - When 100% of the molecules get split
When is an acid weak?
When they only partially ionises in aqueous solutions - When less than 100% of the molecules get split
To prepare a solution, some … is dissolved in a …
To prepare a solution, some SOLUTE is dissolved in a SOLVENT
A concentrated solution contains a … amount of solute dissolved in a relatively … volume of solution
A concentrated solution contains a LARGE amount of solute dissolved in a relatively SMALL volume of solution
A dilute solution contains a … amount of solute dissolved in a relatively … volume of solution
A dilute solution contains a SMALL amount of solute dissolved in a relatively LARGE volume of solution