Nurse Cheung Chemistry
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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Direct change from solid to gas is called Dry ice is an example
Sublimation
Direct change from gas to a solid is called Fire extinguisher
Deposistion
Property of Matter • Does not depend on the size or amount of matter in the object Intensive or Extensive • Does depend on the amount of matter in the object Exp. Is mass Intensive or Extensive? Is boiling point Intensive or Extensive?
• Intensive • Extensive Mass is Extensive Boiling Point is Intensive
What kind of bond is water
Polar covalent
This property of water allows it to travel through tiny capillaries and create surface tension
Cohesiveness
This property of water allows it to stick to other molecules and dissolve them
Adhesiveness
A ____ bond occurs when atoms share electrons
Covalent
Covalent bonds are common between elements of the same type. True or False
True
What is a polar covalent bond
2 atoms sharing electrons unequally. Hence, one has a slightly negative and one a slightly positive charge.
This type of bond happens when 1 atom gives up and the other recieves an electron.
Ion
Ionic bonds happen most between these types of elements. With this type of element usually giving up the electron.
Metals & non metals Metal gives up electron to non metal
Cations give or receive electrons Anions give or receive electrons What are their charges
Cations give electrons Anions receive electrons Cation Positive Anions Receive
Define solute, solvent, solution and give an example.
Solute disolved in the solvent to make a solution. Salt (solute) water (solvent) salt water (solution)
2Na + Cl2 → 2NaCl Is this type of reaction
Synthesis
2 seperate things joining together to form 1 compound is this type of reaction.
Synthesis
AB → A + B What is this type of reaction?
Decomposition
What kind of reaction is 1 compound breaks down into 2 or more compounds
Decomposition
2AqNO3 + Cu -> Cu(NO3 ) 2 + 2Aq 2AlPO4 + 3Mg -> 2Al + Mg3 (PO4 ) 2NaBr + Cl2 -> 2NaCl + Br2 These are examples of which type of reaction
Single replacement
A ____ is a substance that gives off hydrogen (H+) ions when disolved in water. A _____ or alkaline substance is one that gives off hydroxide (OH-) when it is disolved in water.
Acid Base
Litmus paper turns which color in the presence of a base. An acid
Blue Red
• HC²H³O² • H³PO⁴ • NH⁴OH • LiOH • HCL • KOH • NaOH WHICH ARE ACIDS AND WHICH ARE BASES How to tell the difference
• ACID • ACID • BASE • BASE • ACID • BASE • BASE
CH⁴ + O² —> CO² + H²O Type of Reaction Reactants: A compound containing Carbon & Hydrogen + Oxygen Products: Carbon Dioxide + Water
Combustión
One element that starts off by itself replaces another element in a compound Fe + CuCl² —-> Cu + FeCl² Is this type of reaction
Single Replacement
A + BC —-> B + AC
SIngle Replacement reaction