1. Starter Question 2. Zn + I2 → ZnI2
Zinc reacts with iodine in a synthesis reaction.
a) Determine the theoretical yield if a 125.0g sample of zinc was used.
b) Determine the percentage yeild if 515.6g product is recovered.
3. Is the reaction between gold and oxygen possible? Explain your answer.
2NaOH + H2SO4 → Na2SO4 + 2H2O
20cm3 of 0.2mol/l sulfuric acid exactly neutralises a quantity of 0.5mol/l sodium hydroxide solution. What volume of alkali must have been reacted?
2. Zn + I2 → ZnI2
Zinc reacts with iodine in a synthesis reaction.
a) Determine the theoretical yield if a 125.0g sample of zinc was used.
b) Determine the percentage yeild if 515.6g product is recovered.
3. Is the reaction between gold and oxygen possible? Explain your answer.

2. Exit Ticket
0.24 moles of a salt is dissolved to make 1.2l of solution. What is the concentration of the solution?
2. Aqueous solutions of aluminum chloride and sodium hydroxide are mixed, forming the precipitate aluminum hydroxide. Write a balanced ionic equation for this reaction
3. Predict if the following reaction will occur. If it does write a balanced equation for the reaction
Cl2(g) + HF(aq) →
Answer the following questions then hand in. When you have completed both these tasks you may pack up
0.24 moles of a salt is dissolved to make 1.2l of solution. What is the concentration of the solution?
2. Aqueous solutions of aluminum chloride and sodium hydroxide are mixed, forming the precipitate aluminum hydroxide. Write a balanced ionic equation for this reaction
3. Predict if the following reaction will occur. If it does write a balanced equation for the reaction
Cl2(g) + HF(aq) →

3. The Gas Laws You need to know about 5 of these laws Boyle’s Law
Combined Gas Law
Charles’s Law
Gay- Lussac’s Law
and finally
The Ideal Gas Law

4. P1V1 = P2V2 Boyle’s Law Named after Robert Boyle
One of the founders of modern Chemistry
Boyles Law states that for a given mass of a gas, at constant temperature, pressure and volume are inversly proportional
P1V1 = P2V2

5. V1T2 = V2T1 Charles’s Law This law is credited to Jacques Charles
Invented the hydrogen filled balloon for air travel, think blimps
Charles’s law states that at constant pressure the volume of a gas increases as temperature increases
V1T2 = V2T1

6. P1T2 = P2T1 Gay- Lussac’s Law
This law is named after Joseph Louis Gay- Lussac
Co discovered Boron and recognised iodine as a separate element
This law states that if the volume of a gas remains constant then the pressure is directly proportional to the temperature
P1T2 = P2T1

7. Combined Gas Law P1V1 = P2V2 T1 T2
As is suggested by the name this law combines each of the previous ones into one rule
P1V1 = P2V2
T1 T2
NB: For all gas law calculations temperature must be in Kelvin and volume in litres.

8. PV = nRT The Ideal Gas Law
This law combines Boyle’s and Charles’s Law with Avogadro’s Law
Avogadro’s Law states that if two gases have the same pressure and temperature then equal volumes of the two gases will have the same number of molecules.
PV = nRT
pressure
temperature, K
gas constant
volume
number of moles

9. Now try the following problems
4. A helium filled balloon at sea level has a volume of 2.1l at atm and 36oC. If it is released and rises to an elevation at which the pressure is atm and the temperature is 28oC, what will be the new volume of the balloon?
3. The pressure in an automobile tire is 1.88atm at 25.0oC. What will be the pressure if the temperature warms up to 37.0oC
2. A gas at 89oC occupies a volume of 0.67l. At what temperature will the volume increase to 1.12l?
1. The volume of a gas at 99.0kPa is 300ml. If the pressure is increased to 188kPa, what will be the new volume?
2. A gas at 89oC occupies a volume of 0.67l. At what temperature will the volume increase to 1.12l?
3. The pressure in an automobile tire is 1.88atm at 25.0oC. What will be the pressure if the temperature warms up to 37.0oC
4. A helium filled balloon at sea level has a volume of 2.1l at atm and 36oC. If it is released and rises to an elevation at which the pressure is atm and the temperature is 28oC, what will be the new volume of the balloon?

10. Today’s Task
Complete the gas law worksheet