Which of the labeled hydrogen atoms in the following structure is the most acidic?   

What alkyl bromide should be used in the acetoacetic ester synthesis of the following methyl ketone?   

Experimentally to produce 2-ethylpentanal from pentanal, how should the reaction conditions be adjusted to ensure the alpha substitution product rather than the aldol product or a mixture of the two products result?    

Which compound has the lowest pKa?  

Which compound’s α H is the least acidic?  

The reaction of only LDA with acetophenone produces ________.

Which set of reagents would best accomplish the following transformation?     

Which of the following structures could be constructed by way of a malonic ester alkylation?     

Which of the following is least likely to undergo a smooth crossed Claisen condensation with methyl pentanoate?  

If 20.0 L of NH3 gas measured at 295 K and 1.05 atm was needed for a complete reaction with 0.723 L  solution of HBr according to the equation below, what was the molarity of the HBr solution? NH3(g)  +  HBr(aq) –>  NH4Br(aq)