03/23/25

Titration of HNO2 with NaOH...need pH
Consider a titration of 10.0 mL of 0.30 M HNO2 with 0.10 M NaOH.Ka HNO2 = 7.1 x 10-4a. pH of solution before titration begins?b. pH when 12.00 mL NaOH has been added?c. pH when 15.00 mL NaOH is added
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03/21/25

CHEM 2 Solubility
Calculate the Qsp or Ksp, as indicated, and determine whether a precipitate will form when each of the following mixtures is prepared. (You may assume temperature is held constant, volumes are... more
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03/18/25

Use Ksp & Kf to find equilibrium constant for the reaction
Use the values of Ksp FeS(s) = 3.72 x 10-19 and Kf Fe(CN)64−(aq) = 1.5 x 1035 andto find the equilibrium constant for the reaction.FeS(s) + 6 CN− (aq) ⇌ Fe(CN)6 4− (aq) + S2−Please solve using... more
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03/18/25

A 50.0-mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M nitric acid.
A 50.0-mL sample of 0.200 M sodium hydroxide is titrated with 0.200 M nitric acid.Calculate pH:after adding 30.00 mL of HNO3at the equivalence point
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03/18/25

pH and pKa Henderson-Hasselbalch Approach
Calculate the pH of a buffer solution that is 0.050 M in benzoic acid (HC7H5O2) and0.150 M in sodium benzoate (NaC7H5O2). For benzoic acid, Ka = 6.5 × 10–5.Please show with ICE table too.
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03/17/25

A 0.5224-g sample of an unknown monoprotic acid was titrated with 0.0998 M NaOH.

A 0.5224-g sample of an unknown monoprotic acid was titrated with 0.0998 M NaOH. The equivalence point of the titration occurred at 23.82 mL. Determine the molar mass of the unknown acid.Please... more
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03/17/25

Calculate the solubility of silver chloride in a solution that is 0.100 M in NH3. Using Ksp
Calculate the solubility of silver chloride in a solution that is 0.100 M in NH3. (Use standard Ksp AgCl(s) = 1.77 x 10-10 andKf Ag(NH3)2+ = 1.7 x 107 )
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03/17/25

Calculate the molar solubility of barium fluoride in each liquid or solution.

Calculate the molar solubility of barium fluoride in each liquid or solution. BaF2 Ksp = 2.45 x 10-5 Ksp(BaF2)=2.45×10−5 a) Pure water b) 0.15 M NaF
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03/17/25

What is the pH of 0.214 M KCN?
What is the pH of 0.214 M KCN?When search the internet, often the equation is changed to HCN, what happens to the Potassium?How to solve?Thank you!
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03/16/25

General Chemistry 2
The pH of an aqueous solution of 0.248 M sodiumcyanide, NaCN, is (answer). (Assume that Ka (HCN) = 4.00 x 10^-10).This solution is _____ (acidic, neutral, basic).
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03/16/25

Arrange the solutions in order of increasing acidity. Given Ka & Kb values
Arrange the solutions in order of increasing acidity. Ka (NH4+) = 5.6 x 10-10 Kb (ClO2-) = 9.1 x 10-13 NaCl, NH4Cl, NaHCO3, NH4ClO2, NaOHWhere to even begin?
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03/15/25

How can a student best keep up with what is reduced and what is oxidized in a given equation?
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03/13/25

What is the molecular geometry for methane?
How do you know the molecular geometry of methane?
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03/13/25

Gen Chem 2: Ice Tables
5. Build an ICE table for the acid dissociation of ascorbic acid. • Suppose that the percent dissociation is small enough for [HOAsc]initial to be much larger than “x”. • Use the relationship... more
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03/09/25

Determine the pH at the following points in the titration.
A 0.0405 L volume of 0.11 M hypochlorous acid (HClO), a weak acid with Ka = 4.0 ✕ 10−8, is titrated with 0.11 M rubidium hydroxide (RbOH), a strong base.(a) before any RbOH has been added (c)... more
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03/03/25

Molar mass with boiling point?
A solution of 35.7 g of a nonelectrolyte in 220.0 g of chloroform has a boiling point of 64.5 °C. Assuming ideal solution behavior, what is the molar mass of this compound?
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03/03/25

Density to find Molality
Nitric acid, HNO3(aq), is commercially available as a 33.7 m aqueous solution (density = 1.35 g/mL). What is the molarity of this solution?Every time I see a problem where it gives the density to... more
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02/17/25

Acid Base Titration lab Stoichiometry

Percent weight calculation. 0.10 mole of acetic acid (CH3COOH) is dissolved in 100 mL of water. (Assume the density of water is 1.00 g/mL.) What is the percentage (w/w) of acetic acid in this... more
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02/17/25

Diprotic Acid ? - Two Ionizations ?
Oxalic acid (C2H2O4) is a diprotic acid. Write the two ionization reactions for C2H2O4 to C2O42−. Can you please explain how this works and create the reactions?
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02/09/25

For the Reaction A(g)+B(g)+C(g)->D(g) the following data were obtained at constant temperature.
Expt:1– initial rate=6.25x10^-3 M/s, initial [A]= 0.0500 M, initial [B]= 0.0500 M, initial [C]= 0.0100 M2– initial rate=1.25x10^-2 M/s, initial [A]= 0.1000 M, initial [B]= 0.0500 M, initial [C]=... more
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02/08/25

Chemistry Kinetics
A reaction is performed to study the reaction of nitrogen dioxide with carbon monoxide:NO2 + CO --> NO + CO2The following reaction rate data was obtained in four separate... more
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02/08/25

Chemistry kinetics
NO reacts with H2 in the gas phase according to the following chemical equation: 2NO(g) +2H2(g)N2(g) +2H2O(g) It is observed that, when the concentration of H2 is reduced to 1/3 of its initial... more
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02/08/25

Chemistry Kinetics
The reactionH2 (g) + Br2 (g) -> 2HBr (g)is first order in both H2 and Br2, withk=7.61x10^-4 L/mol*sat 291 °C. If 1.00 L of at a concentration of 0.0584 M is rapidly mixed with the same volume of... more
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02/07/25

If 88 g of NaCl reacted with an unknown amount of Ca(OH)2 and 95 g of NaOH was produced with 170 g of CaCl2, how many grams of Ca(OH)2 was reacted?
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02/07/25

Chemical Kinetics - Decomposes in a First-order Reaction
At 1000 degrees Celsius cyclobutene C4H8 decomposes in a first order reaction, with the very high-rate constant of 87 s-1 to two molecules of ethylene C2H4. a) the initial C4H8 concentration if... more
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