A chemist must prepare 250.0 ml. of hydrochloric acid solution with a pH of 1.10 at 25 "C. He will do this in three steps: Fa 250.0 ml. volumetric flask about halfway with distiled water. Measure out a small volume of concentrated (8.OM) stock hydrochloric acd solution and add it to the fask • F the fask to the mark with distiled water. Calculate the volume of concentrated hydrochioric acid that the chemist must measure out in the second step. Round your answer to 2 significant digits

Q: A scientist dilutes 50.0 mL of a pH 5.85 solution of HCl to 1.00 L. What is the pH of the diluted…

A: Given data,pH=5.85Volume of HCl=50mL=0.050LDilution=1.0LKw=1.0×10-14

Q: A chemist must prepare 600.0 mL of sodium hydroxide solution with a pH of 12.40 at 25 °C. He will do…

A: pH = 12.40  We know; pH + pOH = 14 12.40 - pOH = 14 pOH = 14 - 12.40 = 1.6  Now; pOH = -log [OH-]…

Q: Hydrocyanic acid, HCN, is a weak acid (Ka = 4.02*10-10). If I dissolve 0.882 g of HCN in enough…

A: Given information is as follows: The amount of HCN = 0.882 g The volume of water = 600 mL The value…

Q: A chemist dissolves 642. mg of pure barium hydroxide in enough water to make up 100. mL of solution.…

A: Given, Mass of barium hydroxide = 642 mg                                                  = 0.642 g…

Q: A solution of washing soda (sodium carbonate, Na2CO3) has a hydroxide ion concentration of 0.0040…

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Q: A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.80 at 25 °C. She…

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Q: 4. Aqua regia (1:3 mixture of nitric acid and hydrochloric acid) is commonly used to remove noble…

A:

Q: How many grams of NH4Cl (53.49 g/mol) must be dissolved in 0.639 L of solution in order to obtain a…

A: we need to find mass of NH4Cl in the solution for a pH 4.79

Q: 1. What is the pH of an aqueous solution if the [OH -] = 1.35 x 10 -5 M? A. 8.87      B.  5.13…

A: Note - Since you have asked multiple questions, we will solve the first question for you. If you…

Q: ydroiodic acid often is used to disinfect and sanitize medical tools and products. In an experiment,…

A: 1. the hydronium ion concentration of the resulting diluted solution = 0.15M 2. the pH of the…

Q: Question attached

A: Given, Volume of HNO3 = 1 mLVolume of HCl = 3 mLVolume of water = 8 mLConcentration of HNO3 = 0.025…

Q: Milk of magnesia is a suspension of magnesium hydroxide in water. Although Mg(OH)2 is relatively…

A:

Q: A chemist must prepare 550.0 mL of potassium hydroxide solution with a pH of 12.90 at 25 °C. She…

A: Given data,Volume of water=550mL=0.550LpH=12.90

Q: Which of the following is the pH of the solution containing 0.01 mol CH3COOH and 0.820 grams of…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: A chemist must prepare 200.0 mL of hydrochloric acid solution with a pH of 1.10 at 25 °C. He will do…

A: We have to calculate the volume of concentrated acid to be measured out .

Q: Nitrogen is discharged from wastewater treatment facilities into rivers and streams, usually as NH₃…

A:

Q: A chemist dissolves 212.mg of pure sodium hydroxide in enough water to make up 120.mL of solution.…

A:

Q: What is the pH of a solution that is prepared by dissolving 7.50 grams of pyruvic acid (formula…

A: Calculation for finding out the molarity of pyruvic acid:

Q: chemist must prepare 450.0 mL of nitric acid solution with a pH of 2.00 at 25 °C. He will do this in…

A: Given: Concentration of stock nitric acid solution = 7.0 M pH of the solution required = 2.00  And…

Q: Part A If 15.0 mL of glacial acetic acid (pure HC2H3O2; K₂ = 1.8 × 10−5) is diluted to 1.70 L with…

A:

Q: A chemist dissolves 592. mg of pure barium hydroxide in enough water to make up 160. mL of solution.…

A: At 25 oC, the solubility of barium hydroxide, Ba(OH)2 is approximately 4.70 g / 100 mL water.  Since…

Q: A chemist must prepare 500.0 mL of sodium hydroxide solution with a pH of 12.30 at 25 °C. He will do…

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Q: What quantity of moles of glucose (C₆H₁₂O₆) in 0.500 L of a 0.400 M solutions?     The pH of a basic…

A:

Q: A chemist must prepare 250.0 mL of nitric acid solution with a pH of 1.40 at 25 "C. He will do this…

A: Given that: The volume of nitric acid, V1 = 250 mL pH = 1.40 molarity of nitric acid, stock…

Q: Question 3 The pyridinium ion (C5HANH) is a weak acid (Ka = 5.60 x 10-0). Calculate the pH of a…

A: The solution will act as acidic buffer.

Q: Question 3?

A: Buffer solution contains a weak acid/base together with a salt of its common ion with a strong…

Q: A chemist must prepare 800.0 mL of sodium hydroxide solution with a pH of 13.70 at 25 °C. She will…

A:

Q: A chemist must prepare 600.0 mL of sodium hydroxide solution with a pH of 13.40 at 25 °C. She will…

A:

Q: A chemist must prepare 850.0 mL of sodium hydroxide solution with a pH of 12.60 at 25 °C. He will do…

A:

Q: A chemist must prepare 550.0 mL of sodium hydroxide solution with a pH of 12.50 at 25 °C. She will…

A: PH + POH= 14

Q: A chemist must prepare 550.0 mL of potassium hydroxide solution with a pH of 13.90 at 25 °C. He will…

A: Given: Volume of solution = 550.0 mL = 0.550 L                                (Since 1 L = 1000 mL)…

Q: A chemist must prepare 900.0 mL of sodium hydroxide solution with a pH of 13.40 at 25 °C. He will do…

A: The given data contains, pH = 13.40Volume of solution =900 ml.

Q: Aspirin (acetylsalicylic acid, C9H8O4) is absorbed from the stomach in the free (un-ionozed) acid…

A: Handerson Hasselbalch equation –  Buffer solution is mixture of weak acid and its conjugate base.…

Q: Which of the following is the pH of the solution containing 0.01 mol CH3COOH and 0.820 grams of…

A: Use the Henderson-Hasselbalch equation, which I have shown below: pH = pKa + log [[CH3COO-]…

Q: Solution X 100 mL of 0.10 M HCI Solution Y 200 mL of 0.50 M NAOH Solution Z 300 mL of distilled…

A: The solutions given are,

Q: A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the…

A: Given:  % mass =  5.25 Molar mass of NaOCl =  74.5 g V1 =  ??   ,     V2 =  500 mL Assuming that the…

Q: 1. What is the pH of 0.25L of chicken soup? How about 0.5L? Is it acidic or basic? 2. Does the pH…

A:

Q: Aspirin, which is acetylsalicylic acid, is the most common over the counter pain killer. If a…

A: Given: aspirin has a [OH-] = 5.8  10–12 M

Q: A chemist must prepare 450.0 mL of nitric acid solution with a pH of 1.60 at 25 °C. He will do this…

A:

Q: A chemist must prepare 600.0mL of nitric acid solution with a pH of 0.90 at 25°C. He will do this…

A: 600 mL of nitric acid solution has a pH of 0.90 at 25° C . Concentration of the stock nitric acid…

Q: A chemist must prepare 550.0 mL of hydrochloric acid solution with a pH of 1.10 at 25 °C. He will do…

A: We have to predict the volume of stock solution.

Q: A chemist must prepare 700.0 mL of sodium hydroxide solution with a pH of 12.30 at 25 °C. She will…

A: pH = 12.30As we nowpH  +  pOH = pKw12.30   +  pOH =  14pOH = 14-12.30pOH = 1.7

Q: For 2.2 x 10-M KOH (from Part E), determine the pH and pOH. or each of the following strong base…

A: Applying concept of PH PH= -log [H+]  PH+ POH= 14

Q: Kw = 0.114 x 10-14 at 0°C = 1.00 x 10-14 at 25°C Kw Kw = 2.42 x 10-14 at 37°C Kw = 9.61 x 10-14 at…

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Q: a) What is the pH of a solution prepared by adding 11.1 mL of 0.50 M NaOH solution to 200. mL of a…

A: The question is based on the concept of buffer solution.   A buffer is a solution which resist any…

Q: What is the pH of the resulting solution if 100.0 mL of 0.10 M NAOH is added to 50.0 mL of 0.84 M…

A: Lactic acid is a weak containing one acidic hydrogen. Dissociation of weak acid lactic acid takes…

Q: What is the pH of a solution prepared by adding 66.0 ml of 0.100 M HNO3 to 72.2 mL of 0.31 M NaOH?

A:

Q: A chemist must prepare 550.0 mL of sodium hydroxide solution with a pH of 13.00 at 25 He will do…

A: Given : Volume of solution = 550 mL = 0.550 L                                       (Since 1 L =…

Q: 0.010 M aqueous solution of the weak acid, m-Nitrophenol (C6H4NO2OH) has a pH of 3.44. Calculate the…

A: The question is based on the concept of chemical equilibrium. we have to calculate acid dissociation…

Q: What are the concentrations of all the solute species in 0.150 M lactic acid, HC3HSO2? What is the…

A: Given: 0.150M lactic acid, HC3H5O2 Ka for lactic acid is 1.4x10-4 First the concentration value of…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".