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Complete question below
Date Posted: 22/06/2021
Category: Chemistry
Due Date: 24/06/2021
Instruction
1. What is the pH of a 0.0043 M HCl solution? (2 marks) 2. What is the pH of a solution of sodium hydroxide that has a hydroxide ion (OH-) concentration of 1.5×10-10? (3 marks) 3. What is the conjugate base of the following acids? (3 marks) a. HCl b. H2SO4 c. H3PO4 4. Write the net ionic equation for the following reaction. (3 marks) CaCO3(aq) + 2HF(aq)  CaF2(aq) + CO2(g) + H2O(l) 5. Write out the full chemical reaction for when nitric acid and sodium hydroxide react. (2 marks) 6. In a closed reaction vessel the following equilibrium is established. 2 HI (g) H2 (g) + I2 (g) The following concentrations were present at equilibrium: [HI] = 0.430 M, [ H2 ] = 0.16 M, [ I2 ] = 0.16 M. What is the value of Keq for this equilibrium system? (2 marks) 7. A sample of oxygen gas occupies 1.34 L at 0.6 atm and 25°C. Calculate the volume when the gas has a temperature of 20°C and a pressure of 1.2 atm. (3 marks) 8. Calculate the number of moles of Cl2 gas in 2.41 L at STP. (3 marks) 9. The ionization constant, Ka, for an acid, HA is 1.5 10-6. For a 0.03 M solution of HA calculate the following: (4 marks) A. [ H+1 ] B. pH
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