Why does meat take a long time to burn?
2 answers:
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21. change in temperature, change in color, or noticeable odor (after reaction has begun)
22. Picture... Wasn't so sure about this since no charge was given, so I suspected it has a charge of 2. If you have more information on this I would be glad to help, and I can't tell what is happening with the calculations given. It would be helpful if you can add spaces or put a line break.
23. An ion is an atom or molecule with an electric charge. It is formed when atoms lose or gain electrons. There are two types of ions: cations (net positive charge) and anion (net negative charge).
24. Picture
25. a) dinitrogen tetrahydride
b) phosphorus triiodide
c) lithium hydroxide
<u>Answer:</u> To calculate the pH of the buffer composed of , we use the
<u>Explanation:</u>
Phosphoric acid is a triprotic acid and it will undergo three dissociation reaction each having their respective dissociation constants.
The chemical equation for the first dissociation reaction follows:
The chemical equation for the second dissociation reaction follows:
The chemical equation for the third dissociation reaction follows:
To form a buffer composed of , we use the
of second dissociation process
To calculate the , we use the equation:
To calculate the pH of buffer, we use the equation given by Henderson Hasselbalch:
We are given:
= negative logarithm of second acid dissociation constant of phosphoric acid = 7.21
= concentration of conjugate base
= concentration of weak acid
Hence, to calculate the pH of the buffer composed of , we use the