Titration of Na2CO3 with HCl. You may want to record your answers in the Data Collection...

Titration of Na₂CO₃ with HCl. You may want to record your answers in the Data Collection section of your lab manual for use during the lab. (pK_a1(H₂CO₃) = 6.352, pK_a2(H₂CO₃) = 10.329).

(a) What are the first and second equivalence volumes (V_eq1 and V_eq2) when 20.00 mL of 0.10 M Na₂CO₃ is titrated with 0.20 M HCl?

V_eq1 = ? mL
V_eq2 = ? mL

(b) What do you expect the pH to be at the following points

The first midpoint of the titration.
pH =

The first equivalence point of the titration.
pH =

The second midpoint of the titration.
pH =

(c) Calculate the pH at each of the following volumes of 0.20 M HCl added to 20.00 mL of 0.10 M Na₂CO₃.

mL 0.20 M HCl	pH
0.00
5.00
10.00
15.00
20.00
22.00

Expert Solution

queen_honey_blossom answered 1 year ago

The concentration of HCl can be determined by titration with a primary standard such as Na2CO3...

The concentration of HCl can be determined by titration with a primary standard such as Na2CO3 (sodium carbonate). The titration reaction isCO3^(2-) + 2H+ yields H2O + CO2What is the concentration of HCl if 25.9 mL of HCl was needed to to react with 0.311 g of Na2CO3 to reach the end point?

A solution of HCl is standardized by titration against 0.242 g of primary standard Na2CO3. The...

A solution of HCl is standardized by titration against 0.242 g of primary standard Na2CO3. The titration requires 35.9 mL of HCl. A solid sample weighing 0.152 g and containing sodium oxide is dissolved in water (Na2O + H2O → 2NaOH) and titrated with HCl, requiring 34.7 mL. What is the percentage of Na2O in the sample?

Table A: Mass data for reaction of NaHCO3 - Na2CO3 mixture with HCl: Mass of crucible...

Table A: Mass data for reaction of NaHCO3 - Na2CO3 mixture with HCl: Mass of crucible and cover 33.2868 (g) Mass of crucible, cover, and mixture 33.7864 (g) Mass of crucible, cover, and residue after reaction with HCl (1st weighing) 33.7070 (g) Mass of crucible, cover, and residue after reaction with HCl (2nd weighing) 33.7012 (g) Mass of crucible, cover, and residue after reaction with HCl (3rd weighing) 33.7020 (g) Mass of unknown mixture used 0.4996 (g) Using the data...

Consider the titration of 50.5 mL of 1.1 M NaOH with 1.0 M HCl. You may...

Consider the titration of 50.5 mL of 1.1 M NaOH with 1.0 M HCl. You may want to reference ( pages 682 - 686) Section 16.9 while completing this problem. Part A What is the pH at the start of the titration? Express the pH to two decimal places. Part B What is the pH at the equivalence point? Express the pH to two decimal places. Part C What is the pH after the addition of a large excess of...

Mass data for reaction of NaHCO3-Na2CO3 mixture with HCL Mass of crucible and cover (g) 28.8258...

Mass data for reaction of NaHCO3-Na2CO3 mixture with HCL Mass of crucible and cover (g) 28.8258 Mass of crucible, cover and mixture (g) 29.4948 Mass of crucible, cover and residue after reaction with HCL (g) 1st weighing... 29.4454 2nd weighing... 29.4455 Calculation of percent NaHCO3 and Na2CO3 in an unknown mixture. ( I need help filling out this chart) mass of unkown mixture used (g) mass of NaCl formed (g) Mass of NaHCO3 in unkown mixture (g) Mass of Na2CO3...

Part I: Writing Balanced Precipitation Reactions For the reaction of AgNO3 with Na2CO3: Record your observations...

Part I: Writing Balanced Precipitation Reactions For the reaction of AgNO3 with Na2CO3: Record your observations when combined in the test tube: Color change: light cloudy brown Write the complete (total) ionic equation for this reaction: Write the net ionic equation for this reaction: For the reaction of Pb(NO3)2 with NaCl: Record your observations when combined in the test tube: Color change: white , State change: liquid to powder Write the complete (total) ionic equation for this reaction: Write the...

Calculate and Interpret Adjusted/Standardized and Unadjusted Mortality Rates Using these data, calculate and record your answers...

Calculate and Interpret Adjusted/Standardized and Unadjusted Mortality Rates Using these data, calculate and record your answers in the blanks below. This exercise is meant to illustrate the effect of age composition on Crude Death Rates (CDR). FAMILY LAND Suburban Population SUN CITY Retirement Community Mid year population Death Rate (per person) Mid Year Population Death Rate (per person) 0-14 1125 0.025 1132 0.025 15-29 2342 0.013 875 0.013 30-49 1508 0.026 1736 0.026 50+ 503 0.110 3458 0.110 ...

Record the transactions below, similar to your Practice Set, and prepare financial statements. Record the answers...

Record the transactions below, similar to your Practice Set, and prepare financial statements. Record the answers to the questions in the separate Excel answer sheet. Do not upload your worksheets or calculations, as only the answers to the questions below will be graded. Assume the accrual basis of accounting under which revenues are recorded in the period earned and expenses in the period incurred. Transactions During the Month of October: 1. After graduating from law school, Heidi worked for a...

Note: for the following you may enter your answers as calculations using * for times; /...

Note: for the following you may enter your answers as calculations using * for times; / for divide and ** for to the power. For example, 10 over 7 cubed would be 10/7**3. A program to produce greeting cards has 92 pictures to choose from and 17 different sayings. If you randomly select a picture and a saying to make a card, what is the probability of selecting a particular card if all outcomes are equally likely? What is the...

1. You may have already noticed that the shape of your spectrophotometric titration curve is quite...

1. You may have already noticed that the shape of your spectrophotometric titration curve is quite different than the shapes of the potentiometric titration curves which you have constructed in earlier experiments. Why? (HINT: Think about the mathematical relationships between pH and concentration and absorbance and concentration . . .). 2. When performing a potentiometric titration it is very important to make a large number of measurements near the endpoint, while for a spectrophotometric titration one actually ignores the measurements...

Question