chem hw

Name: ______________________________________ Chemistry 106: Homework 3 (Part 1) Chapter 14 Use chemical equations to illustrate how HSO4+ can act as an acid. a base. Arrange the members of each group in order of decreasing acidity: H2O, H2Se, H2S HI, HCl, HBr, HF H3PO4, H3PO3 For each of the following write the a) molecular formula b) total ionic equations, and c) net ionic equations. HNO2 + LiOH HCl + NH3 Identify the lewis acid and base and the donor and acceptor atoms in the following reaction: Chapter 15 What is the concentration of the species in a solution produced when 500. mL of 3.00 M HCl solution is added to 500. mL of 3.00M LiOH. Assume that the volumes are additive. Give the name and formula of the salt formed. Calculate the molarity of a solution of HNO3 if 19.55 mL of the solution neutralizes 0.2040 g of Na2CO3 (a commonly used standard). A 25.0 mL sample of 0.0400 M Ca(OH)2 is added to 15.0 mL of 0.100 M HNO3. Is the resulting solution acidic or basic? How many moles of excess acid or base are present? How many additional mL of Ca(OH)2 or HNO3 would be required to completely neutralize the solution? Chapter 16 Consider the gas phase system below at a high temperature. Write the expression for the equilibrium constant, Kc 4NH3 + 5O2 4NO + 6H2O What is the value of Kc for the reaction CH4(g) + H2O(g) CO(g) + 3H2(g) if at equilibrium [CH4] = 0.20 M, [H2O] = 0.20 M, [CO] = 0.50 M and [H2] = 1.50 M? For the system H2(g) + CO2(g) H2O(g) + CO(g) at equilibrium, describe how the following would ‘shift’ the reaction (left, right, or no effect according to LeChatelier's principle) and how it would affect Kc. adding H2(g) removing CO2(g) increase temperature decrease pressure adding CO What must be true of the value of ?Gº for a reaction if K>>1 K = 1 K<<1 The following initial partial pressures were measured at 750ºC: PH2 = 0.387 atm, PCO2= 0.152 atm, PCO = 0.180 atm, and PH2O= 0.252 atm and the equilibrium partial pressure for PCO2 = 0.098 atm. What is the value of the equilibrium constant, Kp for the reaction? What is the value of Kc? H2 + CO2 ? CO + H2O