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What is the partition coefficient of salicylic acid?
The partition coefficient of salicylic acid is approximately 2.29 at a pH of 7.4.
What is the standard partition coefficient of paracetamol?
The partition coefficient of paracetamol is reported to be around 0.36 at pH 7.4.
What pH is Cresol?
All three isomers are very weak acids, pKa values varying from 10.26 (o- and p-cresol) to 10.09 (for m-cresol). This means that 1.00 M (standard) solutions in water have pH values of 5.13 to 5.05 (at 25oC).
What is the pH of an aqueous solution with the hydronium ion concentration h3o plus equals 4 x 10-13m?
p = -log[H+] = 12.4
How long would it take to double 2000 at 6 percent interest rate compounded annually?
Using the compound interest formula A = P(1 + r/n)^(nt), where A is the final amount, P is the principal amount, r is the interest rate, n is the number of times interest is compounded per year, and t is the number of years, we can solve for t when A = 4000, P = 2000, r = 0.06, and n = 1. Plugging these values in, we get: 4000 = 2000(1 + 0.06/1)^(1t) 2 = (1 + 0.06/1)^(1t) 2 = (1.06)^t Taking the logarithm of both sides, we can solve for t: log 2 = t log 1.06 t = log 2 / log 1.06 Using a calculator, we find that t is approximately 11.90. Therefore, it would take approximately 12 years to double the initial amount of 2000 at a 6 percent interest rate compounded annually.
A buffer solution of pH 4.95 is to be prepared from acetic acid Ka 1.80 x 10-5 sodium acetate and water What must be the molar ratio of acetate ion to acetic acid in this solution to obtain this pH?
Ka = [H+][A-]/[HA] [H+] = Ka * [HA]/[A-] pH = pKa - log [HA]/[A-] pH = 4.7 - log (2) = about 4.4 Technically I should have taken dissociation of the acid into account when computing the acetate ion concentration, but at these concentrations it's going to be negligible compared to that from sodium acetate.
What is the pKa value of p-methoxyphenol and how does it affect its chemical properties?
The pKa value of p-methoxyphenol is approximately 10.0. This means that it is a weak acid. The pKa value affects the chemical properties of p-methoxyphenol by determining its ability to donate a proton in a chemical reaction. A lower pKa value indicates a stronger acid, while a higher pKa value indicates a weaker acid. In the case of p-methoxyphenol, its pKa value of 10.0 suggests that it is a relatively weak acid compared to stronger acids with lower pKa values.
Can you multiply two irrational logarithms to get a rational answer?
Yes. Take any rational number p. Let a = any number that is not a power of 10, so that log(a) is irrational. and let b = p/log(a). log(a) is irrational so 1/log(a) must be irrational. That is, both log(a) and log(b) are irrational. But log(a)*log(b) = log(a)*[p/log(a)] = p which is rational. In the above case all logs are to base 10, but any other base can be used.
What is the pka of sodium benzoate?
From this salt the benzoate ion C6H5-COO- is a base ( the other part Na+ is neutral).This base has a pKB value of 9.80 (benzoate)The pKacid value of its conjugated benzoic acid ( C6H5-COOH) however ispKbenzoic-acid = 4.20 = pKa(which is (not surprisingly) equal to 14.0-pKbase = 14.0-9.80)
What does phs stand for?
Some say that pH stands for the "power of hydronium," (or hydrogen) but this is disputed. Other interpretations include "percentage of hydronium" or "potential of hydronium," with hydronium interchangable with "hydrogen." The "p" could also be a constant that means "the negative log of" as in pKa.
When does log p X equals 0?
When X is 1, regardless of the base p.
How do you log in to Pokemon volcano?
the right way >:P
How do you solve for a power in a math problem?
You have to use logarithms (logs).Here are a few handy tools:If [ C = D ], then [ log(C) = log(D) ]log(AB) = log(A) + log(B)log(A/B) = log(A) - log(B)log(Np) = p times log(N)
What lop P value should drugs have for percutaneous administration?
They should have a log P value of 2.6.
Is epinephrine lipophilic?
slightly log P of 1.35 is barely cutting it
What is the hydronium ion concentration of a solution with a pH of 6.0?
pH is defined as: pH = -log[H+] where '-log' is the negative of the mathematical function log base 10, 'log10' and [H+] is the concentration of hydrogen ions or hydronium (H3O+) in mol dm-3 If you can work out the concentration of H+ ions in aqueous solution, put it into the pH equation to work out pH. It's useful to know that 'p' in physical chemistry generally means '-log', so pKa is equal to -logKa.
What does pH indicator?
p = -log H= concentration of hydrogen in solution (H+) therefore, pH= -log [H+] or [H+] = 10-pH
