Answer:
pH of the buffer is 7.33
Explanation:
The mixture of the ions H₂PO₄⁻ and HPO₄²⁻ produce a buffer (The mixture of a weak acid, H₂PO₄⁻, with its conjugate base, HPO₄²⁻).
To find pH of a buffer we use H-H equation:
pH = pka + log [A⁻] / [HA]
<em>Where A⁻ is conjugate base and HA weak acid.</em>
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For the H₂PO₄⁻ and HPO₄²⁻ buffer:
pH = pka + log [HPO₄²⁻] / [H₂PO₄⁻]
Computing values of the problem:
pH =7.21 + log [0.125M] / [0.095M]
pH = 7.33
<h3>pH of the buffer is 7.33</h3>
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Centriole
vacuole
lysosome
cell membrane
liver
and so many more
Answer:
D. The catalyst could absorb one of the particles, making a successful (reaction-producing) collision with the other particles more likely.
Explanation:
The way that a solid (heterogenous) catalysts functions is by the reactant getting adsorbed to the surface of the catalyst at active sites. An interaction between the surface of the catalyst and the reactant makes the reactants more reactive, causing the reaction to happen.
Answer:
4.36 ppm
Explanation:
First we convert percent transmittance to absorbance:
Then we <u>calculate the concentration of the solution</u>, using <em>Lambert-Beer's equation</em>:
It is usually used with molar concentrations but given that the given absortivity is in ppm terms and the answer is also in ppm, we can simply use the given value.
- 0.268 = 6.14x10⁻²L·ppm⁻¹ * 1.00 cm * C
