0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Explain why 7 minus negative 5 is 12?
7 - (-5) = 7 + 5 = 12 Taking away a negative number is defined as adding its absolute value.
Explain why the equation 4x plus 5 equals 4x - 1 has no solutions?
If you subtract 4x on each side, you get 5 = -1, which is false. Note that this doesn't depend on the value of x, so this is false for any value of x.
What is the difference between a face value and a value in 3508?
The face value of 3 is 3: the value of 3 is 3000The face value of 5 is 5: the value of 5 is 500The face value of 3 is 3: the value of 3 is 3000The face value of 5 is 5: the value of 5 is 500The face value of 3 is 3: the value of 3 is 3000The face value of 5 is 5: the value of 5 is 500The face value of 3 is 3: the value of 3 is 3000The face value of 5 is 5: the value of 5 is 500
How do you add 2 integers if they have different signs explain how to determine the sums sign?
The sign of the sum will be the same as the number with the greatest absolute value. -9 + 4 = -5 -4 + 9 = 5
What is the Absolute Value -5?
Absolute value of -5 is 5.
What is the advantage of knowing the pKa of an acid-base indicator?
The advantage of knowing the pKa of an acid-base indicator is that it tells you the approximate pH value at which the color of the indicator changes. For example, if the pKa of an indicator is 5, then it means that it's going to change colors at around pH 5.
What is the Ka for acetic acid CH3COOH?
The KB value is listed below: pKa + pKb - 14 pKa = -log10 (Ka), Ka of acetic acid = 1.8*10^-5 pKa = 4.74, pkb = 9.255 9.255 = -log10(Kb), Kb = 5.56*10^-10
What is the PH value of potassium sulphate?
The pKa of HSO4- (the second pKa of H2SO4) is 1.92. The Ka is thus 0.0120
What are the acidic hydrogens in salicylic acid?
The OH group bonding with the carbonyl group has a pKa around 5, and the OH group connected ortho of the carbonyl group has a pKa around 10. Added correction: Salicylic acid is a monoprotic, not a diprotic acid in water. From wikipedia table value: pKa 2.97
What is the Ka value for ammonium nitrate?
The pKa of ammonium nitrate (NH4NO3) is approximately 4.1. This is a weak acid. Split it apart into NH4 and NO3. Add OH to NH4 and H+ to N03. NH40H is a weak base, while HNO3 is a strong acid. Strong acid + weak base =H= weak acid. You could also just look at the pKa value, convert it into Ka, and see that it is more acidic. To convert, do 10^-pKa. You should get 7.9 x 10^-5. This value shows it is acidic.
How do you determine the pKa value of an organic compound for HPLC method?
the organic compound three kind normal, acid and basic compound for acid compound the pKa from 3 to 5, normal pKa around 7 and basic compound more than 7 also you can know the kind of organic compound from structure that you can see acidic or basic grope like carboxylic acid or amine.
A drug has pKa 5. at which PH it will be 99.9 percent ionized?
To determine at which pH a drug will be 99.9% ionized, we need to consider the Henderson-Hasselbalch equation. The pH at which a drug is 99.9% ionized can be estimated by finding the pH value that is one unit above the pKa of the drug. Therefore, in this case, the drug will be 99.9% ionized at a pH of 6.
How do you explain which 5 has the smallest value in 0.55?
Of course the first 5 from right. 0.55 = 0.50 + 0.05, according the first 5 from right has a value of 0.05 while the first 5 from left has the value 0.50 which is ten times the other right 5.
Explain why 7 minus negative 5 is 12?
7 - (-5) = 7 + 5 = 12 Taking away a negative number is defined as adding its absolute value.
Will a negative number to the fifth power be a positive or a negative value explain?
Negative, because 5 is an odd number
What is the pH of a 0.05M solution of TRIS acid with a pKa of 8.3?
If the pKa is 8.3, when Ka = 10^-pKa = 5.012*10^-9. Then, [H+]= sq. rt(Ka*C0). {C0 is the intial concentration of the acid}. [H+] = sq. rt[(5.012*10^-9)(0.05M)} = 1.58*10^-5 M Then, pH = -log[H+] pH = -log (1.58*10^-5M) = 4.8
Which has greater buffering capacity at Ph 3.5-5 acetic acid or citric acid?
The ideal buffer has a pKa equal to the pH of the solution (see the Related Questions links for more about this).Citric acid is a triprotic acid (C(OH)(CH2CO2H)2CO2H), and therefore has 3 different pKa's (for each acid group): 3.13, 4.76, 6.40Acetic acid, CH3COOH is a monoprotic acid, and only has one pKa: 4.75.Because of the multiple pKa's that span the pH range of interest (3.5-5), citric acid would have a high buffering capacity than acetic acid for the same concentration of buffer solution.
