Recent content by gkangelexa

Can someone help me understand this statement: The pKa of most fatty acids is around 4.5, so most fatty acids exist in their anion form in the cellular environment. I know what a pKa is... it is -log(Ka), where Ka is the equilibrium constant of the reaction. In this case the Ka would be...

Homework Statement Carbon dioxide partial pressure: a. increases in the blood as it travels from the systemic venules to the inferior vena cava b. is greater in the blood in the systemic capillary beds than in the alveoli of the lungs. The Attempt at a Solution The answer is...

to make the choice to commit suicide, the animal must have a knowledge of life and death. i don't think animals have that sense or knowledge, for I think it is a philosophical sort of knowledge, and animals go by instinct, which this is not.

thanks.. I was just wondering because my study book didn't mention it turning into an ion, which was weird

Beta decay is when a neutron creates a proton and an electron and the electron is then expelled, right? So I was wondering, why would the new atom formed not be an ion? If the neutron became a proton, the mass number should stay the same, and the atomic number should increase by 1 since...

what do you mean it has nothing to it :-(?

I noticed that in water, sound travels faster than in air, but when light hits water, its velocity decreases. Is this because sound is a longitudinal wave and light is a transverse (electromagnetic) wave??

\DeltaG = -n F Emax and \DeltaG = \DeltaG\circ + RT ln(Q) When do we use the first equation and when do we use the second one?

As electrons leave one half of a galvanic cell and flow to the other, a difference in charge is established. If no salt bridge were used, this charge difference would prevent further flow of electrons. Why would the charge difference prevent further flow of electrons ??

My book says that you cannot use the Henderson-Hasselbalch equation to find the pH at the equivalence point when titrating a weak acid with a strong base... I was wondering why not? it says that instead you must use the Kb of the conjugate base and that we find that from the Kw and the Ka...

An buffer solution consists of a mixture of a weak acid and its salt (conjugate base and a cation) or a mixture of a weak base and its salt (conjugate acid and an anion). When you titrate (for example) a weak acid with a strong base, then at the half equivalence point, there are equal...

My book says the following: NH4NO3 is weakly acidic as a salt because it is composed of the conjugates of the base NH3 and the strong acid HNO3. Why does that make it weakly acidic exactly?? Is it because the HNO3 is a strong acid, therefore it won't steal the protons that are...

What are the benefits of having Alternating current instead of direct current? I'm just wondering why we use AC instead of DC..

When temperature increases, the resistance in a wire also increases. ( I = V/R ) However, when the temperature increases, viscosity (resistance in a fluid) decreases... These are both resistances. Why does temperature increase cause an opposing effect in them?

I think i understand your explanation the best. thanks!