A 0.500 g sample of impure CaCO3 is dissolved in 50.00 mL of 0.0985 M HCl. After the reaction is complete, the excess acid is titrated by 6.0 mL of 0.105 M NaOH. Find the percent purity of the CaCO3 sample. (CaCO3 = 100 g/mole)

Q: A student weighs out 0.9854 g of Na2CO3 unknown and dissolves it in 25.00 mL of deionized water. A…

A: Answer % of Na2CO3 in the unknown = 54.05% Formulas No.of moles                           = Given…

Q: What is the pH of the buffer solution that contains 1.6 g of NH4Cl in 250 mL of 0.060 M NH3? Is the…

A: pH of a basic buffer can be calculated using Henderson-Hasselbach equation: pH=14-(pKb+logB+BOH)

Q: A buffer must be a pH of 10.00 and 750 mL total volume. We have 20 L of 0.20 M NaHCO3 and solid…

A:

Q: A 25.00-mL sample of an HI solution is titrated to the equivalence point using 0.639 M KOH. If the…

A: The equation used to calculate the unknown values is, M1V1=M2V2 where M is the molarity and V is the…

Q: A student in conducting molecular weight determination of an uninown diprotic acid. He first…

A: KHP dissociates completely to form K+ and HP-. HP- then acts as weak acid. KHP and NaOH are…

Q: 35 mL of 0.25 M HCIO Solution is titrated to the endpoint with a 0.20 M KOH solution. HCIO Ka=…

A: Titration of a weak Acid with a strong base:  The pH changes during a titration of a weak acid with…

Q: A 0.6423 g sample that might contain NaOH, Na₂CO₃, NaHCO₃, or a permissible mixture of the bases is…

A: NaOH is a strong acid, so first it will be completely neutralised by the strong acid HCl. The…

Q: in an experiment, the molecular formula for calcium hydroxide was determined to be Ca(OH)2. In this…

A: Given that : The mass of Ca = 0.050 g The volume of DI water = 150 mL The molarity of HCl = 0.30 M

Q: 8. As a rough calculation (i.e. not a ICE table), follow the instructions for Part 3a to calculate…

A:

Q: 78.48 mL of a solution of the acid HNO3 is titrated, and 66.50 mL of 0.7900-M NaOH is required to…

A: The volume of HNO3, V1=78.48 mL  The volume of NaOH, V2= 66.50 mL  The concentration of NaOH,…

Q: 1. Answer the following questions for the titration of an aqueous solution of oxalic acid by an…

A: Here we have to write the balanced net ionic equation for the reaction of KOH with H2C2O4 at first…

Q: A 75.0 mL sample of 0.100 M NH3 is titrated with 0.100 M HCI. What is the most likely pH of the…

A:

Q: A 30.0-mL sample of 0.165 Mpropanoic acid (CH3CH2COOH, Ka = 1.3 × 10−5) is titrated with 0.300 MKOH.…

A:

Q: A student performs a titration of 62.0 mL of a phosphoric acid (H₂PO₂) solution of unknown…

A: The question is based on the concept of titration.We are titrating  a weak phosphoric  acid with a…

Q: You have a 2.20 x 10-2 L  sample LiOH with an unknown concentration. A titration is performed with…

A: Given: Volume of LiOH = 2.20 x 10-2 L Molarity of HNO3 = 2.19 M Volume of HNO3 = 24.6 mL

Q: You are performing an experiment in lab that involves the titrations of a H2SO4 solution. You…

A: Write down the reaction between NaOH and H2SO4. 2 NaOH + H2SO4 → Na2SO4 + 2 H2O From the…

Q: Mixing 10 mL 1 M NH4Cl with 10 mL 1 M NH3 Why is this an effective buffer? Please provide the…

A: Buffer is the one which can be formed by the weak acid and its conjugate base or weak base and its…

Q: Weak acid HMa (0.150 M) has 65.00 mL is titrated with 0.15 M NaOH. The Kaminoan scientist adds…

A:

Q: 34.19 mL of 0.17 M HNO2 (a weak acid) is titrated with 0.17 M NaOH (a strong base). What volume of…

A: Balanced chemical equation is,HNO2 + NaOH = NaNO2 + H2OAt equivalence point, both reactants…

Q: A 0.221 g sample of an unknown monoprotic base was placed in a flask and dissolved in 125 mL of…

A: The objective of this question is to determine the molecular weight of an unknown monoprotic base…

Q: A 100 mL sample contains Na2CO3 and NaOH. A 25 mL aliquot was taken and phenolphthalein was added as…

A: (1) Step 1 phenophthalein is used as an indicator. (2) Step 2 methyl orange is used as an indicator.

Q: Consider the titration of 115.0 mL of 0.100 M HI by 0.250 MNAOH. Part 1 Calculate the pH after 35.0…

A:

Q: A monoprotic weak acid, HA (K, = 1.78 × 104), was titrated against NaOH. A 50.00-mL of 0.04870 M HA…

A: Given: Ka of HA = 1.78×10-4 Concentration of HA (M1) = 0.04870 Volume of HA (V1) = 50.00 mL…

Q: 4. A student accidently titrated the acetic acid with 1.00 M NAOH solution instead of 0.10 M NAOH.…

A: The curve which is form between the pH and volume of alkali is known as titration curve.

Q: When we take 0.8 g of NaHCO3 and 0.2 g of NaOH in water to get volume of 250 ml.Then take 50 ml of…

A:

Q: 78.48 mL of a solution of the acid HNO3 is titrated, and 66.50 mL of 0.7900-M NaOH is required to…

A: Given : Concentration of NaOH = 0.7900 M Volume of NaOH required = 66.50 mL And volume of HNO3…

Q: A sample of Na2CO3 is titrated with 0.250M H2SO4. If the sample weighs 1.1000 g and requires 35.00…

A:

Q: A 30.0-mL sample of 0.165 Mpropanoic acid (CH3CH2COOH, Ka = 1.3 × 10−5) is titrated with 0.300 MKOH.…

A: CH3CH2COOH        -------->        CH3CH2COO-   +     H+     C…

Q: A 52.6 mL sample of 0.214 M NH3 is being titrated by a 0.164 M HCl solution. NH3 has a Kb value of…

A:

Q: Calculate the concentration of H2SO4 solution that has been used in the titration of 9.80 mL of…

A: Balanced Reaction H2SO4 + 2 NaOH →Na2SO4 + 2 H2O So, 1 mol H2SO4 reacts with 2 mol NaOH

Q: 1) Type an equation to represent how lithium hydroxide reacts with water. 2) Calculate the pH of the…

A:

Q: Q 25 mL of a mixture of NaOH and Na 2 CO 3 was titrated with 0.1 HCI using phenolphthalein indicator…

A:

Q: Imagine you want to want to make a phosphate buffer in the lab that resembles the bloods phosphate…

A: Here we are required to find the buffer of the solution.

Q: Determine the pH at the equivalence point in the titration of 50.0 mL of 0.300 M CH₃COOH with 0.300…

A:

Q: Given the following data, calculate the grams of HCl neutralized in the titration using 0.250 M…

A: Ans is 0.1449g

Q: A 0.765 gram sample of an unknown monoprotic acid is titrated to equivalence point with 23.36 mL of…

A: The molecular weight of the unknown monoprotic acid can be calculated as follows.

Q: A titration of 49.0 mL of a sulfuric acid (H2SO4) solution of unknown concentration with a…

A: When Sulfuric acid Solution is titrated with barium hydroxide Solution then barium sulfate and water…

Q: A 100 mL sample contains Na2CO3 and NaOH. A 25 mL aliquot was taken and phenolphthalein was added as…

A: Phenolphthalein can only detect the neutralization of NaOH and Na2CO3 to NaHCO3.  The balanced…

Q: 1)A 30.0-mL sample of 0.165 M propanoic acid (CH3CH2COOH,                 Ka=  1.3x10−5) is titrated…

A:

Q: 250 ml volume of a mixture of 0.8g of NaHCO3 and 0.2g of NaOH in water. Take 50 ml of this mixture…

A: Moles of NaHCO3 in 5o mL = mass of NaHCO3molar mass of NaHCO3 x 50250 = 0.884 x 15 = 0.0019 mol =…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.