Answer in 4-5 sentences.
Question 1,
A chemist tells you that an orange solution has a higher concentration of hydronium (H3O+) ion than a red solution. Which of the solutions has a higher pH? Which is more acidic?
Question 2,
Identify the acid, base, conjugate acid and conjugate base in the following equation: HCl (aq) + H2O ⇄ H3O+ (aq) + Cl– (aq)
Question 3,
State the ideal gas law and find the the volume of occupied by .32 moles of carbon dioxide gas at 1 atm and 273 K. (Reminder: R = 0.08206 L atm mol ̄1 K ̄1)
Question 4,
Describe the motion of molecules and the bonds between nearby molecules as a substance is heated and changes from liquid to gas.
Question 5,
A half-empty (half-full?) glass of water contains solid molecules in the glass itself, liquid molecules in the water, and gaseous molecules in the air above the water. All are at the same temperature. Why are the three materials in different states?
PLEASE HELP.
I wish you had shown what you know about these questions OR tell us what you don't understand about them. I don't like just GIVING you the answers.
A chemist tells you that an orange solution has a higher concentration of hydronium (H3O+) ion than a red solution. Which of the solutions has a higher pH? Which is more acidic?
The higher the concentration of H3O^+ the more acidic and the less the pH.
Question 2,
Identify the acid, base, conjugate acid and conjugate base in the following equation: HCl (aq) + H2O ⇄ H3O+ (aq) + Cl– (aq)
The acid is the one with more H and the base is the one with fewer H^+ of the pair and the one accepting the H^+. So identify the pairs.
One pair is H2O and H3O^+. The other pair is HCl and Cl^-
Of the HCl/Cl^- pair, HCl has more H^+ so it is the acid and Cl^- on the other side is the conjugate base. Of the H2O/H3O^- pair, H2O has fewer H so it is the base and H3O^+ is the conjugate acid.
Question 3,
State the ideal gas law and find the the volume of occupied by .32 moles of carbon dioxide gas at 1 atm and 273 K. (Reminder: R = 0.08206 L atm mol ̄1 K ̄1)
PV = nRT. Substitute from the problem and solve for volume (in liters).
Question 4,
Describe the motion of molecules and the bonds between nearby molecules as a substance is heated and changes from liquid to gas.
As heat is added to a liquid the molecules move faster and faster as their kinetic energy is increased. At temperatures high the bonds between the liquid molecules weaken and at some point they break apart and the liquid becomes gaseous.
Question 5,
A half-empty (half-full?) glass of water contains solid molecules in the glass itself, liquid molecules in the water, and gaseous molecules in the air above the water. All are at the same temperature. Why are the three materials in different states? The temperature of the air is too high for it to be a solid (to freeze) or too high for it to be a liquid. Similar arguments may be made for the solid in the glass and the water in the glass.