UNIT 3 Lesson 1-5
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。
卡片预览 (24 张)
What is an electrolyte?
it is a substance that conducts an electric current when dissolved in water
fill in the blank therefore an _____ allows electricity to flow through it.
electrolytic solution
what happens when an electrolyte is dissolved in water?
it seperates into thwo iona of oposite charges: positive and negative
What is dissociation?
When an ionic compound is dissolved in water. This means the ions separate.
What type of molecule is made of ions?
ionic compounds
What are the steps for electrolytic dissociation euqations?
1.seperate the elements 2.write the charges(use periodic table) 3.make sure the little numbers become bigger numbers (watch out for cant touch thisss) 4. include the state of the matter (aq) tip= the charges will always equal eachother
The amount of current flowing ina solution depends on ….
the amount of ionas present
(..) … the higher the degree of dissociation = …
(the greater the number of ions)= the stronger the electrolyte
Describe the non-electrolytic solution and give an example
• a covalent compound (non metal and non metal) is dissolved in water • so no ions are produced • example = sugar
describe the weak electrolytic solution and give an example
• incomplete ionic dissociation • results in very few ions being released example = vinegar (acetic acid)
describe a strong electrolytic solution and give an example
• complete or FULL ionic dissociation • results in ALL ions being released example = salt
What are the three types of electrolytes?
• acids • bases • salts
give me the properties of an acid
• conducts electricity (as electrolytic solution) • reacts with metals • taste sour • turns litmus paper RED
give me the properties of a base
• conducts electricity (as electrolytic solution) • do not react with metals • taste bitter • feels slippery • turns litmus paper BLUE
give me the properties of salts
• substance produced by the chemical bonding of a metal and a non metal • are neutral (not acidic or basic) • conducts electricity (as electrolytic solution) • do not react with metals • do not affect litmus paper
how do you identify an acid?
• acids contain a positive hydrogen ion (H+) in the formula • C and H only are not acids, they are hydrocarbons • exception is NH3, it is a base
how do you identify a base
• usually conatin a negative hydroxide ion (OH-) in the formula • CH3COOH or C2H4O2 is an exception, it is an acid
how do you recognize a salt
look for a non metal and a metal
the ph of a solution is …
an indication of the concnetraion of H+ ions in that solution
what does PH mean?
• “the power of Hydrogen” or “potential of Hydrogen”
describe acidic vs basic solutions
• acidic solutions have a ph of acids less than 7, while bases have a ph of greater than 7 • there will be more hydrogen ions than hydroxide ions in an acidic solution while in a basic solution there are more hydroxide ions than hydrogen ions
what is another word for basic?
alkaline
what ph does neutral have
7
red litmus paper is associated with what solutions
acidic