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Chemistry

10/19/23

Acids and bases

Is Ca^+2 ion neutral, acidic or basic ? I think it’s a strong base because if it’s ionizing with h H2O, it turns to Ca(OH) right? but I’m not completely sure.

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Chemistry

10/19/23

What is the pH of a solution prepared by mixing 0.50 L of 0.40 M CH3CO2H with 5.0 L of 0.40 M CH3CO2Na?

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Chemistry

10/19/23

Determine the pKb of HPO4 2-.

Determine the pKb of HPO4-2

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Chemistry

10/19/23

Calculate the pH of a solution

Calculate the pH of a solution containing 38 g Sr(OH)2 dissolved in 125 mL of solution at 298 K.

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Chemistry

10/19/23

Calculate the Kb

1. A 0.135 M solution of a weak base has a pH of 11.23. Determine Kb for the base at 298 Kelvin.

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Chemistry

10/19/23

What is the concentration of Hg 2+ in 500.0 ml of a solution that was originally M Hg 2+ and 0.78 M I-?

The overall formation constant for HgI42- is 1.0 x 10 ^30. 1.0 x 10^30 = HgI42-/(Hg2+)(I-)^4

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Chemistry

10/19/23

You mix a 200.0 ml sample of a solution that is 1.5x10^-3 M Cu(No3)2 with a 250 ml sample of a solution that is 0.20M NH3. After the solution reaches equilibrium, what concentration of Cu2+ remains?

kf Cu(NH3)4 = 1.7 x 10^13 'Equation: Cu2+ (aq) + 4NH3(aq) = Cu(NH3)4 2+(aq)

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Chemistry

10/19/23

Calculate the resulting pH of each of the following mixtures.

Calculate the resulting pH of each of the following mixtures.a. 100. mL of 0.100 M Na3PO4 + 150. mL of 0.180 M HNO3b. 100 mL of 0.200 M NH3 + 50.0 mL of 0.500 M HCl

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Chemistry

10/19/23

Find the pH of the following weak acids or bases: a 0.725 M solution of pyridine (C5H5N). Kb = 1.69 x 10-9

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Chemistry

10/19/23

Determine whether each of the following will form a solution that is acidic, basic, or pH-neutral.

Determine whether each of the following will form a solution that is acidic, basic, or pH-neutral. C2H5NH3NO3 FeCl3K2SO4NaHSO4Ca(NO2)2(CH3CH2)2NH

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Chemistry

10/19/23

What is the pH of a solution prepared by mixing 0.50 L of 0.40 M CH3CO2H with 5.0 L of 0.40 M CH3CO2Na?

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Chemistry

10/19/23

Find the percent ionization of : a 1.35 M solution of generic base B. Kb = 6.62 x 10-3

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Chemistry

10/19/23

Calculate the resulting pH when 100. mL of 0.200 M HOCl is mixed with

Calculate the resulting pH when 100. mL of 0.200 M HOCl is mixed witha. 75 mL of 0.15 M KOH b. 275 mL of 0.15 M KOH

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Chemistry

10/19/23

Suppose Kw is 4.0 × 10-14 at some temperature.

Suppose Kw is 4.0 × 10-14 at some temperature.a. Calculate pH and pOH for pure water at this mystery temperature. pH = pOH = b. Suppose you have a solution with a pH of 6.75 at this mystery... more

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Chemistry

10/19/23

How many grams of CaCl2 are needed to make 229.4 g of a solution that is 35.0% (m / m) calcium chloride in water?

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Chemistry

10/19/23

Complete the balanced chemical equation for the following reaction between a weak base and a strong acid. KNO2+H2SO4

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Chemistry

10/18/23

Determine the formal charge on each atom in the structure.

Determine the formal charge on each atom in the structure.Answer Bank: -4,-3,-2,-1,0,1,2,3,4 H H B H H

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Chemistry

10/18/23

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.molecular formula:CHSO

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Chemistry

10/18/23

calculate the number of molecules of oxygen required to react with 16.0g of sulfur in the following reaction S + O2 --------SO3

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Chemistry

10/18/23

CH4 + O2 ------ CO2 +H2O if 6.00 mol of CO2 are produced, how many moles of )2 were used?

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Chemistry

10/18/23

Calculate the final concentrations of K+(aq), C2O4^2-(aq), Ba^2+, and Br^-(aq)in a solution prepared by adding 0.100 L of 0.200M K2C2O4 to 0.150 L of 0.250M Babr2. Ksp value is 2.3 x 10^-8

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Chemistry

10/18/23

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.molecular formula:?molar mass:? g/molpercent by mass of sulfur:? %Biological studies... more

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Chemistry

10/18/23

Indicate the direction of polarity of any polar covalent bonds. If a bond is covalent or ionic, leave it blank.

Indicate the direction of polarity of any polar covalent bonds. If a bond is covalent or ionic, leave it blank. C−C C−H C−S S−S S−O Answer Bank: +--> or <--+

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Chemistry

10/18/23

o A diprotic acid (HA) has Kal = 4.60 × 10-7 and Ka2 = 5.24 × 10-¹¹. What is the pH of a 0.489 M H₂A solution? pH =

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Chemistry

10/18/23

calculate the moles of oxygen needed to react with 1.20 g of cigarette lighter gas, butane, C4H10 in combustion reaction

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Acids and bases

What is the pH of a solution prepared by mixing 0.50 L of 0.40 M CH3CO2H with 5.0 L of 0.40 M CH3CO2Na?

Determine the pKb of HPO4 2-.

Calculate the pH of a solution

Calculate the Kb

What is the concentration of Hg 2+ in 500.0 ml of a solution that was originally M Hg 2+ and 0.78 M I-?

You mix a 200.0 ml sample of a solution that is 1.5x10^-3 M Cu(No3)2 with a 250 ml sample of a solution that is 0.20M NH3. After the solution reaches equilibrium, what concentration of Cu2+ remains?

Calculate the resulting pH of each of the following mixtures.

Find the pH of the following weak acids or bases: a 0.725 M solution of pyridine (C5H5N). Kb = 1.69 x 10-9

Determine whether each of the following will form a solution that is acidic, basic, or pH-neutral.

What is the pH of a solution prepared by mixing 0.50 L of 0.40 M CH3CO2H with 5.0 L of 0.40 M CH3CO2Na?

Find the percent ionization of : a 1.35 M solution of generic base B. Kb = 6.62 x 10-3

Calculate the resulting pH when 100. mL of 0.200 M HOCl is mixed with

Suppose Kw is 4.0 × 10-14 at some temperature.

How many grams of CaCl2 are needed to make 229.4 g of a solution that is 35.0% (m / m) calcium chloride in water?

Complete the balanced chemical equation for the following reaction between a weak base and a strong acid. KNO2+H2SO4

Determine the formal charge on each atom in the structure.

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.

calculate the number of molecules of oxygen required to react with 16.0g of sulfur in the following reaction S + O2 --------SO3

CH4 + O2 ------ CO2 +H2O if 6.00 mol of CO2 are produced, how many moles of )2 were used?

Calculate the final concentrations of K+(aq), C2O4^2-(aq), Ba^2+, and Br^-(aq)in a solution prepared by adding 0.100 L of 0.200M K2C2O4 to 0.150 L of 0.250M Babr2. Ksp value is 2.3 x 10^-8

Use the structure to determine the molecular formula, molar mass, and percent by mass of sulfur in this compound.

Indicate the direction of polarity of any polar covalent bonds. If a bond is covalent or ionic, leave it blank.

o A diprotic acid (HA) has Kal = 4.60 × 10-7 and Ka2 = 5.24 × 10-¹¹. What is the pH of a 0.489 M H₂A solution? pH =

calculate the moles of oxygen needed to react with 1.20 g of cigarette lighter gas, butane, C4H10 in combustion reaction

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