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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: samiam on January 15, 2011, 09:48:05 AM

Title: What happens when COOH loses Hydrogen
Post by: samiam on January 15, 2011, 09:48:05 AM

So COOH-->COO^- + H^+
why is the molecule now negative because we treat H as a proton? so now COO has one less proton so more electrons giving it a negative charge?

Title: Re: What happens when COOH loses Hydrogen
Post by: samiam on January 15, 2011, 12:15:58 PM

Quote from: samiam on January 15, 2011, 09:48:05 AM

So COOH-->COO^- + H^+
why is the molecule now negative because we treat H as a proton? so now COO has one less proton so more electrons giving it a negative charge?

also if nitrogen can only form 3 bonds how can H3N⁺-C exist in amino acids..

Title: Re: What happens when COOH loses Hydrogen
Post by: rabolisk on January 16, 2011, 02:25:50 PM

Charges have to balance out. If you take a proton from a neutral molecule, the remaining molecule has to have a charge of -1, since -1 + 1 = 0.

Who told you that nitrogen can only form 3 bonds?

Title: Re: What happens when COOH loses Hydrogen
Post by: vmelkon on January 24, 2011, 09:29:45 PM

3 bonds is common for nitrogen in a lot of cases but there are others. The best example is the entire set of oxides of nitrogen : N2O, NO, NO2, N2O3, N2O4, N2O5.

Another example, the nitrate ion, nitrogen has 5 bonds.

Title: Re: What happens when COOH loses Hydrogen
Post by: rabolisk on January 24, 2011, 10:22:42 PM

Nitrate ion has 4 bonds, not 5.