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Chemistry

11/06/23

Chemistry Help!

For the diprotic weak acid H2A, Ka1=3.4x10^-6 and Ka2=8.1x10^-9. What is the pH of 0.0700 M solution of H2A? pH=What are the equilibrium concentration of H2A and A2- in this solution? [H2A]=[A2-]

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Chemistry

11/06/23

Chemistry Help!

If a buffer solution is 0.300 M in a weak base (Kb = 7.6x10^-5) and 0.530M in its conjugate acid, what is the pH?

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Chemistry

11/05/23

if 0.178 mol of zinc reacts with excess lead (IV) sulfate, how many grams of zinc sulfate will be produced in the reaction

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Chemistry

11/04/23

Classify each aqueous solution as acidic, base, or neutral at 25 ° C.

Classify each aqueous solution as acidic, base, or neutral at 25 ° C. [OH-]=7.6x10-6 pH=12.06 pH=7.00 [H+]=1.0x10-7

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Chemistry

11/04/23

Classify each aqueous solution as acidic, base, or neutral at 25 ° C.

Classify each aqueous solution as acidic, base, or neutral at 25 ° C. [H+]=6.1x10-4 [H+]=8.3x10-11 [OH-]=6.1x10-9 pH=1.33 [OH-]=7.6x10-6 pH=12.06 pH=7.00 [H+]=1.0x10-7

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Chemistry

11/04/23

how many grams of sodium sulfate, Na2SO4, are produced from 34.3 g of sodium hydroxide, NaOH

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Chemistry

11/04/23

Theoretical yield of chemical reactions

Aqueous hydrobromic acid (HBr)reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O). What is the theoretical yield of sodium bromide formed from... more

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Chemistry Math Physics Organic Chemistry

11/03/23

Determine the observed rotation angle (α) (for part A). Determine the observed rotation angle (α) (for part B).

Part A: The specific rotation ([α]) of Unknown molecule (name is censored on this website but is not relevant for answering the question) in chloroform solvent is -16.3 degrees. determine the... more

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Chemistry

11/03/23

What is the concentration of the H2SO4 solution?

25.00 mL of H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 47.73 mL of a 0.1459 M NaOH solution.What is the concentration of the H2SO4 solution?

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Chemistry

11/03/23

Identify the conjugate acid for each base.

Identify the conjugate acid for each base. Conjugate acid of NH3

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Chemistry

11/03/23

Acid Rain and Buffers

In the Midwest, the natural geologic formation are typically made of limestone ( CaCO3). The limestone in the Midwest provides the lakes and soils with a natural buffer. The questions beloiw... more

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Chemistry

11/03/23

Chemistry molar solubility, common ion effect

Calculate the molar solubility of Ca3(PO4)2{ ksp= 1.99x10^-29} in a solution containing 0.325 M K3PO4 ?(To the tutor who helped me with this problem with me last time, I think some of your... more

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Chemistry

11/03/23

How many moles of NiCl2 N i C l 2 can be formed in the reaction of 8.00 mol m o l of Ni N i and 16.0 mol m o l of HCl H C l ?

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Chemistry

11/03/23

How many moles of nickel will react with 9.71 mol m o l of hydrochloric acid.

How many moles of nickel will react with 9.71 molmol of hydrochloric acid.

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Chemistry

11/03/23

What is the minimum mass of Mg(NO₃)₂ that must be added to 1.00 L of a 0.760 M HF solution to begin precipitation of MgF₂(s)? For MgF₂, Ksp = 7.4 × 10⁻⁹, and Ka for HF = 7.2 × 10⁻⁴.

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Chemistry

11/03/23

chemistry problem i am stuck on

Ammonia gas and oxygen gas react to form water vapor and nitrogen monoxide gas. What volume of water would be produced by this reaction if 7.07 L of ammonia were consumed? Also, be sure your answer... more

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Chemistry

11/03/23

find the ratio for the solution

What ratio of CH₃NH₂ to CH₃NH₃⁺ is needed to prepare a pH 10.00 buffer? (Kb for CH₃NH₂ is 4.4 × 10⁻⁴)

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Chemistry

11/03/23

chem find the mol for a solution

To a 400 mL solution of 0.5 M acetic acid (Ka = 1.75× 10⁻⁵), you add 0.1 moles of KOH to prepare a buffer solution. If you then mix in 100 mL of 0.3 M HCl, what will the final pH be? Hint: the... more

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Chemistry

11/03/23

PH chemistry solutions

What quantity in moles of CH₃NH₃Cl need to be added to 200.0 mL of a 0.500 M solution of CH₃NH₂ (Kb for CH₃NH₂ is 4.4 × 10⁻⁴) to make a buffer with a pH of 11.00?

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Chemistry

11/03/23

Chemical Reaction

When heated, solid calcium chlorate decomposes into solid calcium chloride and releases oxygen gas. What is the formula equation from the word equation?

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Chemistry

11/03/23

Calculate the concentration of the HCl solution.

By titration, it is found that 85.5 mL of 0.177 M NaOH(aq) is needed to neutralize 25.0mL of HCl(aq). Calculate the concentration of the HCl solution.[HCl]=?M

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Chemistry

11/03/23

Calculate the molar solubility(s)

Calculate the molar solubility of Ca3(PO4)2 { ksp= 1.99x10^-29} in a solution containing 0.325 M K3PO4 ?Calculate the molar solubility of Cu3(AsO4)2, { ksp= 7.57x10^-36} in a solution of... more

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Chemistry

11/03/23

Calculate the concentration of buffer components present

Calculate the concentration of buffer components present in 275.00 mL of a buffer solution that contains 0.240 M NH4Cl and 0.240 M NH3 immediately after the addition of 1.90 mL of... more

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Chemistry

11/03/23

How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 5.30 ?

Acetic acid and its conjugate base acetate can form an acid-base buffer. The pKa of acetic acid is 4.75.

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Chemistry

11/03/23

A buffer is prepared by mixing 25.2 mL of 0.183 M NaOH with 144.3 mL of 0.231 M acetic acid. What is the pH of this buffer?

An acid–base buffer is able to resist changes in pH due to the addition of small amounts of strong acid or base to the system. An acid–base buffer typically contains a weak acid and its conjugate... more

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Chemistry Help!

Chemistry Help!

if 0.178 mol of zinc reacts with excess lead (IV) sulfate, how many grams of zinc sulfate will be produced in the reaction

Classify each aqueous solution as acidic, base, or neutral at 25 ° C.

Classify each aqueous solution as acidic, base, or neutral at 25 ° C.

how many grams of sodium sulfate, Na2SO4, are produced from 34.3 g of sodium hydroxide, NaOH

Theoretical yield of chemical reactions

Determine the observed rotation angle (α) (for part A). Determine the observed rotation angle (α) (for part B).

What is the concentration of the H2SO4 solution?

Identify the conjugate acid for each base.

Acid Rain and Buffers

Chemistry molar solubility, common ion effect

How many moles of NiCl2 N i C l 2 can be formed in the reaction of 8.00 mol m o l of Ni N i and 16.0 mol m o l of HCl H C l ?

How many moles of nickel will react with 9.71 mol m o l of hydrochloric acid.

What is the minimum mass of Mg(NO₃)₂ that must be added to 1.00 L of a 0.760 M HF solution to begin precipitation of MgF₂(s)? For MgF₂, Ksp = 7.4 × 10⁻⁹, and Ka for HF = 7.2 × 10⁻⁴.

chemistry problem i am stuck on

find the ratio for the solution

chem find the mol for a solution

PH chemistry solutions

Chemical Reaction

Calculate the concentration of the HCl solution.

Calculate the molar solubility(s)

Calculate the concentration of buffer components present

How much 10.0 M HNO3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 5.30 ?

A buffer is prepared by mixing 25.2 mL of 0.183 M NaOH with 144.3 mL of 0.231 M acetic acid. What is the pH of this buffer?

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