BCR Which Towel.jpg
I
Materials: -3 brands of paper towel
-3 plastic cups
-Graduated cylinder
-beaker

Procedures- 1.) place 30ml of water in 1 cup.
2.) place a sheet of paper towel in a cup, vertically.
3.) leave the paper towel sheet in for 1 minute.
4.) carefully take the sheet out of the water.
5.) measure amount of water left in the cup.
6.) record your result on a data table.
7.) Repeat the expirement with the two other types of paper towels.
8.) After this trial do another trail to ensure accuracy in results.

Variables: Independent: Type of paper towel
: Dependent: Amount of water not absorbed

Data: Record the amount of water left in each cup. As well as the results from both trails.

Accuracy: Conduct two trials of the expirement. To ensure accuracy even more, another pair of trials could be conducted.

BCR Water Molecule.jpg


water.jpeg


water2.JPG

BCR Balloon copy.jpg
I
  • Temperature controls the speed, or kinetic energy, of the gas particles within the balloon. As temperature increases, such as when it’s on the hot plate, the particles have a greater Kinetic Energy, causing it to bounce off of the balloon at a more frequent rate. When the balloon is in the ice water, the kinetic energy of the particles will decrease as the temperature decreases.
  • As the temperature increases, the gas particles, the gas particles increase in kinetic energy, or speed. This causes them to bounce off one another and the walls of the balloon, increasing the pressure.
  • As the pressure increases, the volume will also increase since the balloon is expanding. As the pressure decreases, the volume will also decrease.
II
  • when the temperature is increased it also increased the amount of kinetic energy of the gas particles. and vice versa when it was reduced so was the kinetic energy.
  • the motion of the gas particles increased and speed up and became more chaotic as the heat was applied and when it was reduced the motion of the particles calmed down and reduced.
  • when the motion and temperature was increased there was an increased pressure(due to the increase in the motion of the particles) and the volume of the balloon increased (it inflated) because the pressure made the balloon expand. when the ice was applied the pressure reduced because the motion of the particles reduced and thus the balloon contracted and deflated.

III
-increase in temperature causes kinetic energy of gas particles to increase
-gas particles are spread out, move fast, and collide frequently, increasing pressure
-decrease in temperature(hot plate to ice water) causes pressure to decrease. Decrease in pressure causes volume to increase.

IV
As temp. increases the K.E increases so when the temp. decreases the K.e decreases. When you put the balloon in ice water the particles slow down which causes a decrease in collisions, which is why the balloon deflates from hot to cold water.Pressure and volume decreases.

V
  • describe the effect of temperature on the kinetic energy of the gas particles:
If the temperature increases, the kinetic energy of the gas paricles increase. If the temperature decreases the kinetic enrgy of the gas particles decreases.

  • describe the motion of the gas particles:
The gas particles speed up if the temperature increases and the particles slow down if the temperature decreases.

  • describe the effects of this change on the pressure and volume of the gas sample
When the flask is cooled, the particles in the balloon slow down, causing the volume to decrease. This causes the pressure to increase because there is less space for the particles to move around.
BCR The Race is On.jpg
I
-The atoms must collide with each other for a reaction to occur
-The greater the frequency of the collisions, the greater the rate of reaction would be.
- 3 parts
+Stirring will increase the frequency of the collisions. It creates disorder/entropy allowing the atoms to collide with each other and hit atoms frequently. The reaction would occur faster.
+Also an increase in temperature of the solution will also speed up the reaction because the heat would give the solution a faster and different result. Increase in temperature allows the atoms to collide with each other more frequently which leads to the faster result.
+Increase of surface area of the magnesium would also speed up the reaction because smaller particles have more surface area than larger owns with the same mass, thus increasing the frequency of collision.

II

  • The three conditions necessary for a chemical reaction to occur are kinetic energy, contact, and collision. The kinetic energy is the energy moving the particles. Contact is when the atoms touch. Collision is when the atoms combine to form a new substance. so the kinetic energy causes the contact, which then leads to collision.


  • the relationship of the rate of the chemical reaction and the frequency of collisions between molecules is that faster the rate of reactions the faster the collisions happen.


  • there are four methods for speeding up a chemical reaction. They are heat, molarity, surface area, and catalyst. the heat speeds up the molecules which makes them collide more. the molarity of a solution speeds the rate up because it increases the total amount of particles in the mix which helps speed up the reaction. surface area helps speed up the reaction because the greater area gives the molecules more atoms to collide with. lastly the catalyst helps speed up the reaction because it reduces the kinetic energy needed for the reaction to happen

III
1. The particles of the reactants must reach the activation energy.

2. The particles of the reactants must collide with each other with correct orientation.
  • the faster the reaction rate the more frequent the collisions between atoms
  • increasing the concentration and adding heat will act together to speed up the reaction and the collisions between molecules
VI
1. The electrons must add up to make a full ring that resembles a noble gas. It also requires energy to form bonds.
2. The higher the the rate, the more frequent collisions between molecules.
3. Increase in heat, more surface area, concentration, closers system.