The sodium salt of cacodylic acid, a weak acid, has the formula NaO2As(CH3)2.3H2O. Its molar mass is 214.02 g mol-1 . A solution is prepared by mixing 21.40 g of this substance with enough water to make 1.000 L of solution. Then 50.00 mL of the sodium cacodylate solution is mixed with 29.55 mL of 0.100 M HCl and enough water to bring the volume to a total of 100.00 mL. The pH of the solution is 6.00. Determine the Ka of cacodylic acid.

16.792 g of Ba(OH)2 (171.342 g.mol') is weighed out and carefully dissolved to make a 500.00cm solution. A 25.00 cm of this solution is pipette then transfer into a 100.00 mL volumetric flask, filling up to the mark with water. A 40.00 mL sample of this diluted solution is then reacted with a 0.753 M solution of HNO3. Ba(OH)2(aq) + 2HNO3(aq) → Ba(N03)2(aq) + 2H2O(1) The concentration of Ba(OH)2 in the 100.00 cm3 volumetric flask is: O 1.96 x 103 M O 5.21 x 10-3 m O 4.90 x 10 2M O 1.96 x 101 M O 3.92 x 103 M O None of the above

A student pipets 18 mL of a 0.0459 M solution of CaCl2 into a 100.00 mL volumetric flask and dilutes to the mark. What is the concentration of the resulting solution?

A mixture contains only NaCl and Al2(SO4)3. A 2.67-g sample of the mixture is dissolved in water and enough amount of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.754 g. What is the mass percent of Al2(SO4)3 in the sample? Assume that all aluminum is precipitated as Al(OH)3.

In the neutralization of aqueous acetic acid with aqueous calcium hydroxide, 55.7 mL of 0.100 M Ca(OH)2 was required to react with 15.0 mL of CH3COOH.  What was the molarity of the acetic acid solution?

In the laboratory, a student dilutes 29.1 mL of a 9.35 M hydrobromic acid solution to a total volume of 250.0 mL. What is the concentration of the diluted solution?

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP.How many grams of KHP are needed to exactly neutralize 39.7 mL of a 0.105 M potassium hydroxide solution ?

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC3H,04. This is often written in shorthand notation as KHP. What volume of a 0.438 M sodium hydroxide solution is needed to exactly neutralize 3.48 grams of KHP ?

When 20.00 mL of 1.005 M H,SO, is titrated with a solution of NaOH, 44.68 mL of NaOH is required to neutralize the H,SO4. What is the molarity of the NaOH 4 solution?

Excess Na2SO4(aq) is added to a 4.41×102 mL sample of industrial waste containing Ba2+ ions. If 55.5 g of BaSO4(s) are precipitated from the reaction, what was the molar concentration of Ba2+ in the original sample?