Wavelength decreases as frequency increases.
Imagine a heart rate graph. As the heart beats faster, frequency increases and the time between heartbeats decreases (wavelength).
Make sense that way?
Answer:
The Ka value used for the buffer system is :- Ka2 =
pKa2 = 7.2
pH = 7.1
Explanation:
The buffer system given in the question is :-
and ![Na_2HPO_4](https://tex.z-dn.net/?f=Na_2HPO_4)
The reaction taking place is:-
![H_2PO_4^-\rightleftharpoons HPO_4^{2-}](https://tex.z-dn.net/?f=H_2PO_4%5E-%5Crightleftharpoons%20HPO_4%5E%7B2-%7D)
The Ka value used for the buffer system is :- Ka2 =
pKa2 = 7.2
The pH can be calculated as:-
![pH=pKa+\log\frac{Na_2HPO_4}{NaH_2PO_4}](https://tex.z-dn.net/?f=pH%3DpKa%2B%5Clog%5Cfrac%7BNa_2HPO_4%7D%7BNaH_2PO_4%7D)
pH = 7.2 + log 0.40/0.50 = 7.1
Answer:
334.08 g
Explanation:
87 proof = 43.5%
in 1L of liquid there is 43.5% alcohol/ethanol
1L (43.5/100) = 0.435 L alcohol
we want density in g/L because that's the volume u have
density 0.798 g/mL = 798 g/L
multiply the volume of alcohol by its density to get grams
0.435 L(798 g/L) = 334.08 g