The compound manganese(II) sulfate, MnSO4, is soluble in water. Write the chemical equation for the dissociation reaction that occurs when solid manganese(II) sulfate dissolves in water. Be sure to specify states such as (aq) or (s).

The Winkler method was used to measure the concentration of dissolved oxygen in a sample of river water. Manganese(II) sulfate, sulfuric acid, and potassium iodide were added to 50.0 cm3 of the water. The iodine that was liberated was titrated against sodium thiosulfate solution with a concentration of 2.00x10-3 mol dm-3. 25.00 cm3 of sodium thiosulfate was required for the titration. Calculate the number of moles of sodium thiosulfate used. Calculate the number of moles of iodine present in the