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The diagrams here represent solutions at various stages in the titration of a weak base B (such as NH3) with HCl. Which image best represents the solution at the equivalence point?                                                               

Consider the vaporization process of propane: C3H8 (l)→ C3H8 (g). The ∆Hvap is 90 kJ/mol and the ∆Svap is 99.0 J/mol･K. At 1.00 atm and -125⁰C, which of the following statements is true?

Of the following compounds, an aqueous solution of which substances will form basic solutions.                    NH4ClO4          K2CO3             Cr(NO3)3         NaCl

Venous ulcers occur more frequently on the ankles rather than the thighs due to _____________. 

Consider the following titration curve graphs:   Which plot shows the pH curve expected when HBr is titrated by KOH ?

Methane gas can be produced by the reaction of solid carbon with hydrogen gas as follows                     C(s)   +   2 H2(g)  ⇌   CH4(g) For this reaction at equilibrium, Kp =  0.38.  A vessel containing carbon is sealed and injected inititally with hydrogen to a pressure of 2.0 atm and with methane to a pressure of 2.0 atm. What happens as the reaction proceeds toward equilibrium?  Hint:  this is a K vs Q question.  Which way will the reaction proceed to reach equilibrium?

The diagrams here represent solutions at various stages in the titration of a weak base B (such as NH3) with HCl. Which image best represents the solution in the buffer zone between the initial and equivalence points?                                                               

What is the molar solubility (in M) of manganese (II) hydroxide, Mn(OH)2, in water? Hint:  Ksp of Mn(OH)₂ is 2.1 × 10-13  

The reaction A(g) + B(g) → C(l) is shown to be endothermic. Which of the following is true concerning the reaction?

Consider the following voltaic cell with the overall cell reaction: Zn (s)   +   2 H+ (g)  ⟶ Zn2+ (g)   +    H2 (g) If the pressure of H2 gas is increased in the cathode cell, the value of Q will                  and the value of Ecell will                   .