Cual es la carga de un atomo con 16 protones y 18 electrones?
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Ответ:
Negativo
Explanation:
Porque los electrones son negativos, y los propones son positivos. Sabiendo esto 18 es mayor que 16 entonces es negativo
Ответ:
The pH of the mixed buffer will be
Explanation:
Buffer is prepared by mixing solutions of KH₂PO₄ and K₂HPO₄
H₂PO₄⁻ ⇄ HPO₄²⁻ + H⁺
Using Henderson equation
⇒ pH = pKa₂ + log![\frac{[Base]}{[Acid]}](/tpl/images/0559/1224/ebefd.png)
⇒ 7.45 = -log(6.2 x 10⁻⁸) + log![\frac{[Base]}{[Acid]}](/tpl/images/0559/1224/ebefd.png)
⇒ log
= 7.45 - 7.2
⇒
= ![10^{0.24}](/tpl/images/0559/1224/2f17c.png)
⇒
= 1.737
So, pH of Buffer solution is equal to 1.737