Identify the correct reagent for the second step in the following process. Eto OEt (CH3)2CHCH₂1 CH3CH₂1 CH3CH₂CH₂I 1) NaOEt 2) ? 3) H30*, heat HO CH31 There is no reaction under these conditions or the correct product is not listed here.

A 3.7145 g portion of disodium EDTA dihydrate (M.W. 372.24) was dissolved in enoughdistilled water of prepare 1.000 L of solution. A 100.0 mL water sample was adjusted topH 10 and titrated to the Eriochrome Black T end point with 11.23 mL of the EDTAsolution. When the pH of another 100.0 mL water sample was adjusted to pH 12 andtitrated with EDTA, 2.11 mL of titrant was required. Calculate the concentration of Ca(II)and Mg(II) in the water. Express the answers in mg/L of CaCl2 and MgSO 4 , respectively.

Give clear detailed mechanism Solution with explanation needed..choose the reagents....please avoid handwritten Solution

Give detailed Solution with explanation needed with reactions.....don't give Handwritten answer ...don't give Ai generated solution