IPS Review for Semester 1 Exam
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- What's another term for a weak solution?
- dilute
- Name three characteristics of CO2
- turns limewater cloudy, not flammable, more dense than air
- What kind of property is flammability
- chemical
- What happens tothe solubilty of a solution of gas and H2O when it is heated?
- It's solubilty decreases, gas comes out of solution
- What do we call a combination of a solvent and solute that cannnot be seperated by filtration?
- Solution
- All phases changes are _____ changes.
- physical
- Anytime a gas is given off this is a _____ change
- chemical
- You want to dissolve a cube of sugar in a glass of water, name 3 things you can do to increase the rate at which the sugar dissolves.
- crush, stir, shake
- The smallest change that a balance can detect in a repoducable way is....
- the sensitivity of the balance
- What is conserved...what isn't?
- Mass is conserved, volume isn't.
- What is decant?
- to pour off the liquid and leave the solid behind
- What are the boiling chips used for?
- for wqual and faster boiling
- What observations can we make from lab 1.1?
- Liquid & gas were given off from the baking soda, but we DONT know what they are.
- What is the purpose of the water in the inverted bottle in lab 1.1?
- To measure the amount of gas!
- The freezing point of a substance is the same as the ______
- melting point
- What is liquidWhat is suspension?
- The state in which the particles of a substance are mixed with a fluid but are undissolved.
- Hydrogen:
- flammable, does not turn limewater cloudy, less dneise than air
- methane:
- Flammable, does not turn limewater cloudy, more dense than hydrogen
- There is 25 mL of water in a graduated cylinder. You drop in a rock. Nwo the volume reads 39mL. What is the volume of the rock?
- 14cm squared
- Are measurements laws of nature?
- NO! NEVER!
- During a phase change...what changes? What remains constant
- energy increase or decreases. temperature remains constant
- Elemenets along the zigzag line of the periodic table are known as?
- metalloids
- An insoluble solid with a density of 0.65 is placed in a beaker of water. What will it do?
- float. Density of water is 1. Greater than 1, sinks, less then one it floats.
- Chlorine is a member of which family?
- halogens
- The group whose outer energy level contains 8 electrons are?
- noble gases.
- THe elements that accept electrons are found on which side of the periodic table?
- right (nonmetals). metals reject, nonmetals accept.
- What is the charge on the cucleus?
- postive
- Why do the electrons orbit around the nucleus?
- opposites attract.
- What is the difference between an isotope and an ion?
- isotopes are two atoms of the same element that have different numbers of neutrons (C14 versus C12). ions are atoms that have a charge because they have gained or lost electrons
- What is the mass in amu of 1 molecule of H2O?
- 18 amu
- WHen is a compoud formed?
- when 2 or more elements chemically combine.
- explain the rock salt figure 1.11 on page 13
- The volume of a mixture of salt and water decreases when the salt dissolves in the water, but nothing can be said about its mass.
- What the wax cools and there is a big slope in the middle, what happened?
- The volume decreases and the mass stayed the same.
- We mix 35g of salt having a volume of 100cm, and 54g of water having a volume of 120. What is the volume and mass?
- Mass: 89. Volume unknown
- Which of the following is NOT a characterisitic propert of a solid: density, solubilty, mass, boiling point.
- mass
- When the temperature increases, what happens to the solubility of most gasses?
- they become less soluble
- How do you find the density of a rock?
- Find the volume by the fisplacement of water and mass it on a balance.
- What liquid dissolves TOP?
- alchohol
- What is density?
- Mass per unit volume.
- What is the freezing point of water?
- 0 degrees celsius
- What is the boiling point of water?
- 100 degrees celsius
- What is the density of alcohol?
- 0.79
- A volume of 65cm3 of dry sand is added to 50cm3 of water for a total volume of 95cm3. What is the volume of the water the fills the air?
- 20 cm3
- A volume of 65cm3 of dry sand is added to 50cm3 of water for a total volume of 95cm3. What is the volume of the sand?
- 45cm3
- A volume of 65cm3 of dry sand is added to 50cm3 of water for a total volume of 95cm3. What is the percentage of sand to in the dry sand?
- 69%