5

# 5.(12 pts) A buffer was prepared by dissolving 0.40 mol of benzoic acid (Ka 6.3 10-5) and 0.50 mol of sodium benzoatc in sufficicnt purc watcr tO form 1.00 L soluti...

## Question

###### 5.(12 pts) A buffer was prepared by dissolving 0.40 mol of benzoic acid (Ka 6.3 10-5) and 0.50 mol of sodium benzoatc in sufficicnt purc watcr tO form 1.00 L solution. To this solution was added 30.00 mL of 2.00 M HCI solution_ What was thc pH of the ncw solution? CsH,COOH(aq) + H_O() < H,0' (aq)+ C,H,COO (ag)

5.(12 pts) A buffer was prepared by dissolving 0.40 mol of benzoic acid (Ka 6.3 10-5) and 0.50 mol of sodium benzoatc in sufficicnt purc watcr tO form 1.00 L solution. To this solution was added 30.00 mL of 2.00 M HCI solution_ What was thc pH of the ncw solution? CsH,COOH(aq) + H_O() < H,0' (aq)+ C,H,COO (ag)  #### Similar Solved Questions

##### Nickel is found have mass of 5.02 grams: Using unit analysis, show what the mass of this nickel is in kilograms_(number)(unit)5.02 grams(number)(unic)Suhmit AnsitRctry Entire Sroupmore group attempt remnaining
nickel is found have mass of 5.02 grams: Using unit analysis, show what the mass of this nickel is in kilograms_ (number) (unit) 5.02 grams (number) (unic) Suhmit Ansit Rctry Entire Sroup more group attempt remnaining...
##### 1, Let F = (e" _ Irv , ce") Let C be the portion of the curve Vi &om (0,0) (4,2), followed by the line segment from (4,2) to (4,0), followed by the line segment &om (4,0) to (0,0). points) Sketch C, including &ITOws to show its orientation/direction which it's traced.(8 points) Compute
1, Let F = (e" _ Irv , ce") Let C be the portion of the curve Vi &om (0,0) (4,2), followed by the line segment from (4,2) to (4,0), followed by the line segment &om (4,0) to (0,0). points) Sketch C, including &ITOws to show its orientation/direction which it's traced. (8 ...
##### 2% of the population has a certain disease. A certain blood test detects it for 90% of people with it. The test also indicates the disease for 20% of people without it. (false positives ) Suppose a person is randomly selected and tested for this disease. If the test result is negative; what is the probability that the person does not really have the disease? (10 Puan)0.9970.0090.7860.784
2% of the population has a certain disease. A certain blood test detects it for 90% of people with it. The test also indicates the disease for 20% of people without it. (false positives ) Suppose a person is randomly selected and tested for this disease. If the test result is negative; what is the p...
##### ETLINAALDat Surtut Frce polar or nonpolar? EXFLAIN com Junshaturcnna cone quenenontelt hnlier moleruke?amuad centrelatont ha thice bonding ekrtren molecul huaving lour totall Mncitn ctoup Oncnonkandingeaton grolp iVhat Es its molecular structure? MoupJruI ite centaal Jtm_ Iwo single Eu Wone doubl Amolccule has thnce ttal ckrtron Groups KnlalIh moleculsr gontry nfound the center slom?
ETLINAAL Dat Surtut Frce polar or nonpolar? EXFLAIN com Juns haturc nna cone quene nontelt hnlier moleruke? amuad centrelatont ha thice bonding ekrtren molecul huaving lour totall Mncitn ctoup Oncnonkandingeaton grolp iVhat Es its molecular structure? Moup JruI ite centaal Jtm_ Iwo single Eu Wone do...
##### 4 JlriThe solution of2x2 %"' + 3ry 15y = 0, y (1) = 0, % (1) = 12 11 (--)o 2(4-J)o 1 2 4G (7 4) 8
4 Jlri The solution of 2x2 %"' + 3ry 15y = 0, y (1) = 0, % (1) = 1 2 11 (--)o 2(4-J)o 1 2 4G (7 4) 8...
##### BACKGROUND QUESTIONS What [ the purpose of this experiment? Wrile the reactions thal take place Inis experieni What ihe KEY relationship thatallows us use spectrophotomeby detemmine the amount of = ccliored compourd? What 5 the equation that expresses this relation? Give detailed Cescription of terms present in Ine equation What the purpose adding NaOH to the solution of acetylsalicylic acid? Why necessary react salicylic acid wilh Fe' ? student conducted an ASA analysis of commcrcial asp
BACKGROUND QUESTIONS What [ the purpose of this experiment? Wrile the reactions thal take place Inis experieni What ihe KEY relationship thatallows us use spectrophotomeby detemmine the amount of = ccliored compourd? What 5 the equation that expresses this relation? Give detailed Cescription of ter...
##### How much heat is absorbed when 45.00 gof C(s) reacts in the presence of excess SOzlg) to produce CS2() and COlg) according to the following chemical equation? 5C(s) + 2 SO2lg) CS2() + 4 colg) H' 239.9 kJ2158kJ898.5kJ239.9kJ179.8kJ
How much heat is absorbed when 45.00 gof C(s) reacts in the presence of excess SOzlg) to produce CS2() and COlg) according to the following chemical equation? 5C(s) + 2 SO2lg) CS2() + 4 colg) H' 239.9 kJ 2158kJ 898.5kJ 239.9kJ 179.8kJ...
##### Question 5. (15 marks) We collected two independent samples from Target satisfaction scores Sample data is and Walmart customers" shown below: Target Walmart X = 79 Xz = 71 n, = 25 nz = 30 01 = 12 0z = 12 Formulate the null and alternative hypotheses to test whether there difference between the population mean customer satisfaction scores for two retailers (3 marks) If a population standard deviation of 12 is assumed known for both retailers; Conduct the hypothesis test and report the p-val
Question 5. (15 marks) We collected two independent samples from Target satisfaction scores Sample data is and Walmart customers" shown below: Target Walmart X = 79 Xz = 71 n, = 25 nz = 30 01 = 12 0z = 12 Formulate the null and alternative hypotheses to test whether there difference between the...
##### Use the graph to determine the limit: (If an answer does not exist; enter DNE: )c=-2(-2,3)(-2,21{x) = 3_C((x) TeCf(x) IeGIs the function continuous at * = Yes
Use the graph to determine the limit: (If an answer does not exist; enter DNE: ) c=-2 (-2,3) (-2,21 {x) = 3_C ((x) TeC f(x) IeG Is the function continuous at * = Yes...
##### The local ten-digit telephone numbers in Cincinnati; OH, have 513 as the first three digits. How many different telephone numbers are possible in Cincinnati?0 10Pz 0 10710C710 x 7
The local ten-digit telephone numbers in Cincinnati; OH, have 513 as the first three digits. How many different telephone numbers are possible in Cincinnati? 0 10Pz 0 107 10C7 10 x 7...
##### Write IUPAC names for the compounds below: If you use them, abbreviate ortho-, meta- para-as 0-,m-(no Italics):CH;CH;HyC
Write IUPAC names for the compounds below: If you use them, abbreviate ortho-, meta- para-as 0-,m- (no Italics): CH; CH; HyC...
##### 18)kRA rigid wire in the form of & sennicrde of radus r = Sm lies 0 the top of a fictionless snooth table Theccater of the semicirdle is 0 as shownin the fgure A uifonn magnetic field B = ST out of the paper is applied and confined in the givel region above the dashed line: The ends of the seli cirde wire are attached to one &ds of two identical conducting springs whose other eds are fixed The springs can only move aloug the y-axis: Since the battery â‚¬ = S0V is coqected to fixed ends o
18) k R A rigid wire in the form of & sennicrde of radus r = Sm lies 0 the top of a fictionless snooth table Theccater of the semicirdle is 0 as shownin the fgure A uifonn magnetic field B = ST out of the paper is applied and confined in the givel region above the dashed line: The ends of the se...
##### For Poisson random variable, say X, the standard deviation is known to be 5, The probability that X takes the value 5 isSelect one:b. 0.50.0100d. AlmostNone of the above
For Poisson random variable, say X, the standard deviation is known to be 5, The probability that X takes the value 5 is Select one: b. 0.5 0.0100 d. Almost None of the above...
##### Convert each radian measure to degrees. Write answers to the nearest minute. See Example $2(c)$. $$3.06$$
Convert each radian measure to degrees. Write answers to the nearest minute. See Example $2(c)$. $$3.06$$...
##### A Ilask with a volume of 2.20 L contains 13.90 g of an unknown gas at 38.8 "C and 827 torr: What is the molar mass Of the unknown in gmon? Report your answer to TWO places past the decimal. Do not include units. The gas constant R = 0.082058 Latm/mol-K and atm 760 tOrt:
A Ilask with a volume of 2.20 L contains 13.90 g of an unknown gas at 38.8 "C and 827 torr: What is the molar mass Of the unknown in gmon? Report your answer to TWO places past the decimal. Do not include units. The gas constant R = 0.082058 Latm/mol-K and atm 760 tOrt:...
##### If a critical value is 2.55, what is the critical region(thevalues of the test statistic for which the null hypothesis is to berejected in favour of the alternate hypothesis)
if a critical value is 2.55, what is the critical region(the values of the test statistic for which the null hypothesis is to be rejected in favour of the alternate hypothesis)...