Sodium borohydride (NaBH4) is used industrially in many
organic syntheses. One way to prepare it is by reacting sodium
hydride with gaseous diborane (B2H6). Assuming an 88.5% yield, how many grams of NaBH4 can be prepared by reacting 7.98 g of sodium hydride and 8.16 g of diborane?

1) Explain whya significant excess of sodium borohydride, NaBH₄ is used to reduce aldehydecompounds containing additional acidic functional groups (e.g.phenols, carboxylic acids). Providea balanced chemical reaction for one mole of a carboxylic acid(R-COOH) reacting with one mole of NaBH₄.

2) Lithium aluminum hydride,LiAlH₄ is a much more powerfulreducing agent than sodium borohydride,

NaBH₄; however, both reagents readilyreduce ketones or aldehydes. Provide brief justificationfor why it may be more desirable to use NaBH₄ overLiAlH₄ to reduce an aldehyde.

3)If the reduction of an esteris required, which is a better choice of reagent: lithium aluminumhydride, LiAlH₄, or sodium borohydride,NaBH₄? Pleasebriefly explain your choice.

Having trouble with these questions regarding achem lab, 2nd yr orgo chem. Please help, thanks!

1) Explain whya significant excess of sodium borohydride, NaBH₄ is used to reduce aldehydecompounds containing additional acidic functional groups (e.g.phenols, carboxylic acids). Providea balanced chemical reaction for one mole of a carboxylic acid(R-COOH) reacting with one mole of NaBH₄.

2) Lithium aluminum hydride,LiAlH₄ is a much more powerfulreducing agent than sodium borohydride,

NaBH₄; however, both reagents readilyreduce ketones or aldehydes. Provide brief justificationfor why it may be more desirable to use NaBH₄ overLiAlH₄ to reduce an aldehyde.

3)If the reduction of an esteris required, which is a better choice of reagent: lithium aluminumhydride, LiAlH₄, or sodium borohydride,NaBH₄? Pleasebriefly explain your choice.

Having trouble with these questions regarding achem lab, 2nd yr orgo chem. Please help, thanks!