Ms LF (29 years old, weight 69 kg) presents with a rash consisting of raised purple lesions on her legs. She has a past medical history of osteoarthritis, and recently diagnosed hypothyroidism and anaemia. She has an allergy to cats. She is diagnosed with cutaneous vasculitis. The doctor would like to rule out a drug cause. Her medication history is: Ferrous sulfate 200 mg TDS – started 4 weeks ago Levothyroxine 50 micrograms daily – started 4 weeks ago Loratadine 10 mg daily – started 3 years ago Naproxen 500 mg BD – started 4 weeks ago Paracetamol 1 g QDS – started 3 years ago Which is the MOST LIKELY drug to suspect as a possible cause?

Calculate the molar solubility of thallium chloride in 0.25 M NaCl at 25°C. Ksp for TlCl is 1.7 x 10-4  

The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH. Which point a-d represents the equivalence point for the titration of a weak acid?

Identify the statement that is FALSE.

Consider a reaction that has a negative ΔH and a negative ΔS. Which of the following statements is TRUE?

Consider the dissolution of MnS in water (Ksp = 3.0 x 10–14).                      MnS(s) + H2O(l)  ↔  Mn2+(aq) + HS–(aq) + OH–(aq) How is the solubility of manganese(II) sulfide affected by the addition of aqueous potassium hydroxide to the system?

Give the expression for the solubility product constant for Ca3(PO4)2.

Consider a reaction that has a negative ΔH and a negative ΔS. Which of the following statements is TRUE?

Calculate Ksp for PbI2 at 25°C based on the following data:Species                       ∆G0f, kJ/mol Pb2+ (aq)                        -24.4I- (aq)                              -51.6PbI2  (s)                           -173.6

The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH. Which point a-d represents the equivalence point for the titration of a weak acid?