CHE3167 Final: CHE3167-Transport-notes-2

Disulfur dichloride, which had a revolting smell,can be prepared by directly combining S_​8 and Cl_​2​, but it can also be made by the reaction below. What mass of SCl₂​ is needed to react with the excess NaF to prepare 1.19g of S₂​Cl₂​, if the expected yield is 51%?

3SCl₂​(l)+4NaF(s)-->SF₄​(g)+S_​2Cl_​2​(l)+4NaCl(s)

The half-lives of radioisotopes are given below.

• arsenic-74 - 18 min
• iodine-131 - 8 min
• phosphorus-32 - 14 min
• chromium-51 - 28 min

If the initial amount of chromium-51 is 133 mCi, how much chromium-51 is left in the body after 84 days?(Answer in mCi)

The value of Ksp for silver sulfide, Ag2 (s) , is 8.00 x 10^-51. Calculate the solubility of Ag2 (s) in grams per liter.