A potassium hydroxide solution, previously standardized against KHP, is added from a burette to a beaker...
A potassium hydroxide solution, previously standardized against KHP, is added from a burette to a beaker that contains hydrochloric acid of unknown concentration. One to two drops of phenolphthalein have been added to the acid in the beaker. Potassium hydroxide is the _____.
A. titrant
B. analyte
C.primary
D.indicator
E.standard
Homework Answers
A. Titrant
During titration procedure, a solution of known concentration is added to the unknown analyte. this solution of known concentration is usually added from burette.
this is called titrant.
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A potassium hydroxide solution, previously standardized against
KHP, is added from a burette to a beaker...
KHP, potassium hydrogen phthalate (KHCHO is often used to standardie basic solution used in titration. If...
KHP, potassium hydrogen phthalate (KHCHO is often used to standardie basic solution used in titration. If a 0.855. sample or KHP requires 31.44 ml of a KOR solution to fully realize it, what is the (KOH) in the solution? The reaction is KHC.H.O. KOHK C HO H O . 2. The KOH solution standardized above is used to titrate a 20.00-ml sample of sulfuric acid (H,SO.) solution of unknown concentration. Determine (H.SO.) for the unknown acid solution if 41.27 mL...
1. A potassium hydroxide titrant is standardized using potassium hydrogen phthalate. What is the concentration of...
1. A potassium hydroxide titrant is standardized using potassium hydrogen phthalate. What is the concentration of the titrant if 0.6082 g of KHP requires 38.17 mL to reach the phenolphthalein endpoint? 2. What is the concentration of citric acid in an unknown sample if a 10.00 mL aliquot requires 42.78 mL of the above standardized titrant to reach the phenolphthalein endpoint? 3. How many grams of potassium hydrogen phthalate should be used to standardize 0.200 M potassium hydroxide titrant in...
A potassium hydroxide titrant is standardized using potassium hydrogen phthalate. What is the concentration of the...
A potassium hydroxide titrant is standardized using potassium hydrogen phthalate. What is the concentration of the titrant if 0.6082 g of KHP requires 38.17 mL to reach the phenolphthalein endpoint? Team Member: Collaborative Answer: 0.07826 M Solution: 0.6082 g KHC8H4O1 mol204.22 g KHC8H4O41 mol KOH1 mol KHC8H4O4= 2.978 x10-3 mol KOH concentration=solutesolution=2.987 x 10-3 mol38.17 mLx 1000 mLL= 0.07825 M What is the concentration of citric acid in an unknown sample if a 10.00 mL aliquot requires 42.78 mL of...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5100 Volume of NaOH required to neutralize...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5306 Volume of NaOH required to neutralize...
Preparation of Sodium Hydroxide Titrant: Prepare 500 mL of a 0.1 M sodium hydroxide solution by...
Preparation of Sodium Hydroxide Titrant: Prepare 500 mL of a 0.1 M sodium hydroxide solution by dilution of a 1 M sodium hydroxide stock reagent or from solid NaOH. This dilution need only be performed to 5% accuracy, that is, using a graduated cylinder and an Erlenmeyer flask. Store the diluted solution in a polyethylene bottle. Standardize the diluted solution against dry, solid KHP (potassium hydrogen phthalate) using phenolphthalein as an indicator and label the bottle with the concentration of...
NaOH was standardized by titration against a standard acidic solution of potassium hydrogen phthalate (KHP). 0.4798...
NaOH was standardized by titration against a standard acidic solution of potassium hydrogen phthalate (KHP). 0.4798 g of KHP were dissolved in 100 ml of water to prepare the standard KHP solution. a) What is the molar mass of KHP? (you need to look up its formula and calculate its molar mass from the periodic table). b) If 45.22 ml of sodium hydroxide were required to neutralize the KHP solution, what is the molarity of NaOH?
True or False: During a titration the solution of UNKNOWN concentration should be placed in the...
True or False: During a titration the solution of UNKNOWN concentration should be placed in the burette, and added to the solution of KNOWN concentration (in the E.flask) True or False: When titrating, the acidic solution always goes in the burette, and the basic solution in the E.flask) In order to find the concentration of a chromic acid solution, a student measured out 50.0 mL in a graduated cylinder, then poured this volume into a beaker. The student then added...
Answer both questions please Suppose a sodium hydroxide solution is to be standardized against pure, solid, primary-...
Answer both questions please
Suppose a sodium hydroxide solution is to be standardized against pure, solid, primary-standard grade KHP. If 0.4538 g of KHP requires 44.12 mL of the sodium hydroxide solution to reach a phenolphthalein endpoint, what is the molarity of the NaOH solution? Show your calculations. 5. If 36.32 mL of the NaOH solution described in question 4 was required to titrate a 5.00 mL sample of vinegar, calculate the molarity of acetic acid in the vinegar. Show...
3. A potassium hydroxide solution was standardized against the solid acid, oxalic acid dihydrate. The volume...
3. A potassium hydroxide solution was standardized against the solid acid, oxalic acid dihydrate. The volume of the potassium hydroxide solution required to neutralize 0.317 grams of oxalic acid dihydrate was 48.82 milliliters. Calculate the molarity of potassium hydroxide solution. 4. The molarity of phosphoric acid in a popular cola is to be determined. A 355 mL sample of the cola is O 103 M potassium hydroxide solution. Calculate the molarity of phosphoric acid in the cola.
KHP, potassium hydrogen phthalate (KHCHO is often used to standardie basic solution used in titration. If a 0.855. sample or KHP requires 31.44 ml of a KOR solution to fully realize it, what is the (KOH) in the solution? The reaction is KHC.H.O. KOHK C HO H O . 2. The KOH solution standardized above is used to titrate a 20.00-ml sample of sulfuric acid (H,SO.) solution of unknown concentration. Determine (H.SO.) for the unknown acid solution if 41.27 mL...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5100 Volume of NaOH required to neutralize...
1. A solution of sodium hydroxide (NaOH) was standardized against potassium hydrogen phthalate (KHP). A known mass of KHP was titrated with the NaOH solution until a light pink color appeared using phenolpthalein indicator. Using the volume of NaOH required to neutralize KHP and the number of moles of KHP titrated, the concentration of the NaOH solution was calculated. Molecular formula of Potassium hydrogen phthalate: HKC8H404 Mass of KHP used for standardization (g) 0.5306 Volume of NaOH required to neutralize...
NaOH was standardized by titration against a standard acidic solution of potassium hydrogen phthalate (KHP). 0.4798 g of KHP were dissolved in 100 ml of water to prepare the standard KHP solution. a) What is the molar mass of KHP? (you need to look up its formula and calculate its molar mass from the periodic table). b) If 45.22 ml of sodium hydroxide were required to neutralize the KHP solution, what is the molarity of NaOH?
True or False: During a titration the solution of UNKNOWN concentration should be placed in the burette, and added to the solution of KNOWN concentration (in the E.flask) True or False: When titrating, the acidic solution always goes in the burette, and the basic solution in the E.flask) In order to find the concentration of a chromic acid solution, a student measured out 50.0 mL in a graduated cylinder, then poured this volume into a beaker. The student then added...
Answer both questions please
Suppose a sodium hydroxide solution is to be standardized against pure, solid, primary-standard grade KHP. If 0.4538 g of KHP requires 44.12 mL of the sodium hydroxide solution to reach a phenolphthalein endpoint, what is the molarity of the NaOH solution? Show your calculations. 5. If 36.32 mL of the NaOH solution described in question 4 was required to titrate a 5.00 mL sample of vinegar, calculate the molarity of acetic acid in the vinegar. Show...
3. A potassium hydroxide solution was standardized against the solid acid, oxalic acid dihydrate. The volume of the potassium hydroxide solution required to neutralize 0.317 grams of oxalic acid dihydrate was 48.82 milliliters. Calculate the molarity of potassium hydroxide solution. 4. The molarity of phosphoric acid in a popular cola is to be determined. A 355 mL sample of the cola is O 103 M potassium hydroxide solution. Calculate the molarity of phosphoric acid in the cola.
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