explain why pH = –log ɑH+ is a more accurate calculation than pH = –log [H+], when dealing with non-dilute solutions
In case of non dilute solution it is possible that all of the hydrogen ion is not dissociated and stay in associated form . In that case we have to multiply it's concentration from alpha(degree of dissociation) to get actual amount of ion which is contributing and is responsible for pH. So pH will be negative log of alpha multiplied H+ ion concentration .
explain why pH = –log ɑH+ is a more accurate calculation than pH = –log [H+],...
1. What is the relative ionic strength of a solution of calcium sulfate compared to a solution of sodium chloride. What is the main contributor to this difference? 2. List 2 salts each that should have similar ionic strengths to: a) sodium phosphate, and b) magnesium phosphate. 3. Calculate the ionic strength of a 0.500 M. solution of sodium phosphate, and of a separate solution of 0.500 M magnesium phosphate. Which has the greater ionic strength? 4. Briefly explain why...
1. Calculation: Using the Henderson-Hasselbalch equation, explain mathematically why a solution is at a pH below the pKa for an acid that more than 50% of the molecules have the proton on (not off). 2. Calculation: If you have a pH of 5.5 for a weak acid with a pKa of 4.76, then is there more A- or more HA in the solution? Explain why in words using your knowledge of positive or negative log numbers.
Explain why linkage measurements are more accurate for two genes that are close together than two genes that are farther apart. Why are genes more than 50cM away from each other considered “unlinked?” If two genes are 75cM away from each other, they are not genetically linked, so how do we even know that they are 75cM away from each other?
pH= 4.75 + log (5/5)= 4.75 pH= 4.75 + log (1/5)= 4.05 pH= 4.75 + log (1/10)= 3.75 pH= 4.75 + log 10= 5.75 pH= 4.75 + log 5= 5.44 Table 3: Sodium Acetate Data Sodium Acetate (g) Molarity of Sodium Acetate (Step 7) 4.0 g 0.4876 M Table 4: Buffer Solutions and pH Readings for Beakers A, B, C, D, and E Buffer mL of Acetic Acid mL of Sodium Acetate pH measured A 5 5 4.3 B 5...
7. The pH = -log[+] for a solution. The pOH = -log[OH-] for a solution. The pH and pH are related and their sum is equal to 14 (pH + pOH = 14). If the concentration of a dilute solution of potassium hydroxide is 0.001 M, what is the pH of that solution? 8. Citric acid is produced by oranges. When citric acid dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described...
Consider the function pH = -log[H+], where [H+] is the molarity of H+. Find [H+] and its absolute uncertainty when the pH = 4.51. The pH measurement has an absolute uncertainty of 0.05.
Decision Trees:A) give more accurate solutions than decision tablesB) give less accurate soltions than decision tablesC) are especially powerful when a sequence of decisions must be madeD) are rarely used because one needs specialized software to graph them.E) are too complex to be used by deicion makers
The acidity of a solution can be measured by pH=-log([H+] =-log([H3O+]. What is the pH of a solution if the concentration of H3O+ ions is 1.0X10^-5 M
1.) Explain why linkage measurements are more accurate for two genes that are close together than two genes that are farther apart. 2.) A female poodle with green eyes (recessive) and yellow spots on her tongue (recessive) was bred with a male poodle who was the wild-type phenotype but hybrid genotype for those same two traits. In a series of litters, this breeding pair gave birth to the following 85 puppies: 39 Normal eyes, normal tongue 36 Green eyes, yellow-spot...
QUESTIONS 1. Calculate the pH of the following solutions: (pH = -log[H]) (a) 0.050 M formic acid, HCOOH. K=1.78x104 (b) 0.050 M hydrocyanic acid, K.-4.8x10-10 2. How would you make a 0.00025 M solution of HCI starting with 12 M solution of HCI? 3. Does the K, for acetic acid change (within experimental tolerance) with changes in concentration? 4. What is Le Chatelier's principle? 5. What effect does the addition of acetate ions to a solution of acetic acid have...