Talk:Sodium amide

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[edit] NaNH2 as a reagent

I made some changes that organic chemists may choose to revise further. NaNH2 has no odor, it's a salt after all. Its use in the lab has almost disappeared with the introduction of stronger, more soluble, or more easily handled bases. I am skeptical of the comment that O2 converts NaNH2 to nitrogen oxides.--Smokefoot 04:37, 30 March 2006 (UTC)

[edit] Safety: Burns in air to form nitrogen?

You mean nitrogen dioxide, right? Scot.parker 19:27, 22 September 2006 (UTC)

[edit] pKb = 33?

I thought strong bases had low pKb's. Does 33 refer to pKa?

Agree something is odd here - either the value should be negative i.e. -33 (seems it has been changed from 33 to 38 at some point) or it is pKa value. At any rate it should have a reference -- Quantockgoblin (talk) 00:29, 22 May 2008 (UTC)

From acid dissociation constant, K_b = \frac{K_w}{K_a}.

The pKa of NH3 is around 33, i.e. Ka ≈ 10−33, so its pKb should be approximately - \log_{10} \left ( \frac{10^{-14}}{10^{-33}} \right ) = - \log_{10} \left ( 10^{19} \right ) = -19.

Acid dissociation constant#pKa of some common substances gives the pKb of sodium amide as −19.

Ben (talk) 08:37, 22 May 2008 (UTC)

Added reference to page as cited in the pKa table in Jerry March Advanced Organic Chemistry p 252, fourth ed. -- Quantockgoblin (talk) 11:31, 22 May 2008 (UTC)