0.1081 g of an unknown compound containing CO3^2- was added into 50 mL of distilled water....
0.1081 g of an unknown compound containing CO3^2- was added into 50 mL of distilled water. It took 14.05 mL of 0.1 M HCl to reach equivalence point 2 from titration.
What is the percent carbonate CO3^-2 of the unknown compound?
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0.1081 g of an unknown compound containing CO3^2- was added into
50 mL of distilled water....
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated...
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated the unknown acid with a standardized NaOH solution. Unfortunately, the student over shot the end point and had to back titrate the solution with 2.17 mL of 0.98861 M HCl. Once the final end point was determined, the student had added a total of 29.15 mL of a 1.0324 M NaOH solution. A) How many moles of OH- were used to reach the end...
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated...
The student dissolved 2.050 grams of acid in 50 mL of distilled water. He then titrated the unknown acid with a standardized NaOH solution. Unfortunately, the student over shot the end point and had to back titrate the solution with 2.17 mL of 0.98861 M HCl. Once the final end point was determined, the student had added a total of 29.15 mL of a 1.0324 M NaOH solution. A) How many moles of OH- were used to reach the end...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water and titrated against 0.1555 M NaOH, requiring 48.11 mL to of NaOH to reach the end-point. During the titration reaction, the pH of the solution is 3.77 when half of the HA is neutralized and the equivalence-point pH is 8.33. (a) State two ways to standardize the NaOH used in the titration. (b) Suggest and explain an indicator that can be used in the...
Dissolve 500mg calcium carbonate tablet in 20 mL distilled water and 20.00 mL 2 M HCl....
Dissolve 500mg calcium carbonate tablet in 20 mL distilled water and 20.00 mL 2 M HCl. Transfer each solution quantitatively with distilled water to a 250 mL volumetric flask. Dilute to volume and mix. Titrate 15.00mL aliquots of the tablet solutions with 0.1 NaOH to the phenolphthalein endpoint. Please determine the expected titration volume of tablet. thank you!
In an alkalinity titration of a 100.0-mL sample of water from a hot spring, 2.56 mL...
In an alkalinity titration of a 100.0-mL sample of water from a hot spring, 2.56 mL of a 0.0355 M solution of HCl is needed to reach the first equivalence point (pH=8.3) and another 10.42 mL is needed to reach the second equivalence point (pH=4.0). If the alkalinity of the spring water is due only to the presence of carbonate and bicarbonate, what are the concentrations of each of them?
6. a) If the titration of 2.729 g of an unknown triprotic acid requires 48.15 mL...
6. a) If the titration of 2.729 g of an unknown triprotic acid requires 48.15 mL of 0.4012 M NaOH to reach the third equivalence point, what is the molar mass of this unknown acid? Show your work with units and correct significant figures. 7. If the second equivalence point in the titration of a diprotic acid is at 39.48 mL of strong base titrant added, at what volume is the? First half-equivalence point? Second half-equivalence point? 39.48 ml Second...
2. When 30.00 mL of 0.1011 M HCl in 50 ml of Di water is titrated...
2. When 30.00 mL of 0.1011 M HCl in 50 ml of Di water is titrated against 0.09889 M Naoui pH increases a. What is the volume (in mL) of NaOH required to reach the equivalence point and a pH of 7.007 b. Find the pH when the volume of NaOH added is 0.02 ml less than the volume required to reach the equivalence point. C. Find the pH when the volume of NaOH added is 0.01 mL less than...
Ten grams of an unknown acid was added to 50.0 mL of distilled water. The molarity...
Ten grams of an unknown acid was added to 50.0 mL of distilled water. The molarity of the resulting solution was found to be 8.0 M. What is the moral mass of the unknown acid?
We dissolve 2.77 g of an unknown acid, HA, in enough water to produce 25.0 mL...
We dissolve 2.77 g of an unknown acid, HA, in enough water to
produce 25.0 mL of solution. The pH of this solution of HA(aq) is
1.33. We titrate this solution with a 0.250 M solution of NaOH. It
takes 41.9 mL of the NaOH solution to reach the equivalence
point.
(a) (2 points) What is the molar mass of HA?
(b) (2 points) What is the pKa value of HA(aq)?
(c) (2 points) What is the pH at the...
The titration of 29.40 mL of HCl solution of unknown concentration requires 12.82 mL of a...
The titration of 29.40 mL of HCl solution of unknown concentration requires 12.82 mL of a 0.150 M NaOH solution to reach the equivalence point. What is the concentration of the unknown HCl solution in M?
6. a) If the titration of 2.729 g of an unknown triprotic acid requires 48.15 mL of 0.4012 M NaOH to reach the third equivalence point, what is the molar mass of this unknown acid? Show your work with units and correct significant figures. 7. If the second equivalence point in the titration of a diprotic acid is at 39.48 mL of strong base titrant added, at what volume is the? First half-equivalence point? Second half-equivalence point? 39.48 ml Second...
2. When 30.00 mL of 0.1011 M HCl in 50 ml of Di water is titrated against 0.09889 M Naoui pH increases a. What is the volume (in mL) of NaOH required to reach the equivalence point and a pH of 7.007 b. Find the pH when the volume of NaOH added is 0.02 ml less than the volume required to reach the equivalence point. C. Find the pH when the volume of NaOH added is 0.01 mL less than...
We dissolve 2.77 g of an unknown acid, HA, in enough water to
produce 25.0 mL of solution. The pH of this solution of HA(aq) is
1.33. We titrate this solution with a 0.250 M solution of NaOH. It
takes 41.9 mL of the NaOH solution to reach the equivalence
point.
(a) (2 points) What is the molar mass of HA?
(b) (2 points) What is the pKa value of HA(aq)?
(c) (2 points) What is the pH at the...
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