The arsenic in a 1.233-g sample of a pesticide was converted to H3AsO4 by suitable treatment....

The arsenic in a 1.233-g sample of a pesticide was converted to H3AsO4 by suitable treatment. The acid was then neutralized, and 41.00 mL of 0.05819 M AgNO3 was added to precipitate the arsenic quantitatively as Ag3AsO4. The excess Ag+ in the filtrate and in the washings from the precipitate was titrated with 9.89 mL of 0.1000 M KSCN, and the reaction was Ag+ + SCN- ---> AgSCN (s)

Find the percentage of As2O3 in the sample.

Percentage of As2O3 = ____%

Expert Solution

queen_honey_blossom answered 2 years ago

The arsenic in a 1.27 g sample of a pesticide was converted to AsO3−4 by suitable...

The arsenic in a 1.27 g sample of a pesticide was converted to AsO3−4 by suitable chemical treatment. It was then titrated using Ag+ to form Ag3AsO4 as a precipitate. A- What is the oxidation state of As in AsO3−4? B- Name Ag3AsO4 by analogy to the corresponding compound containing phosphorus in place of arsenic. C- If it took 21.0 mL of 0.106 M Ag+ to reach the equivalence point in this titration, what is the mass percentage of arsenic in...

1)Calculate the pH of a 0.200M solution of arsenic acid, H3AsO4.

Farmers who raise cotton once use arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic...

Farmers who raise cotton once use arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polypeptide acid with K1= 2.5x10^-4, K2= 5.6x10^-8, K3= 3x10^-13. What is the pH of a 0.35M solution of arsenic acid? A) 2.02 B) 3.50 C) 4.06 D) 7.25

1. Farmers who raise cotton onve used arsenic acid, H3AsO4, as a defoliant at harvest time....

1. Farmers who raise cotton onve used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K1 = 2.5 * 10-14, K2 = 5.6 * 10 -8 , and K3 = 3 * 10 -13 . What is the pH of a 0.500 M sol'n of arsenic acid? answer ) 1.96 3. A solution is prepared by adding 0.10 mol of KCH3COO, to 1.00 L of water. Which statement about the sol'n is...

Arsenic acid (H3AsO4) is triprotic, with Ka1=5.5 x 10-3 (10 to the negative 3), Ka2=1.7 x...

Arsenic acid (H3AsO4) is triprotic, with Ka1=5.5 x 10-3 (10 to the negative 3), Ka2=1.7 x 10-7(10 to the negative 7), and Ka3=5.1 x 10-12 (10 to the negative 12). What is the pH of a 0.80 M solution of arsenic acid.,

Arsenic acid (H3AsO4) has Ka values of 2.5 x 10–4, 5.6 x 10–8, and 3 x...

Arsenic acid (H3AsO4) has Ka values of 2.5 x 10–4, 5.6 x 10–8, and 3 x 10-13. What is the concentration of the HAsO42- dianion in a solution whose initial arsenic acid concentration was 0.35 M?

The percentage of arsenic in a sample can be determined by titration with iodine. In the...

The percentage of arsenic in a sample can be determined by titration with iodine. In the determination, all of the arsenic (As) in the sample is converted to HAsO2 followed by titration with iodine (I2) solution. The chemical equation for the reaction between HAsO2 and I2 is: HAsO2 (aq) + I2 (aq) + 2 H2O (l) → H3AsO4 (aq) + 2 H+ (aq) + 2 I − (aq) In an actual analysis, a 0.7034 g sample is dissolved and the...

Treatment of a 0.2496-g sample of impure potassium chloride with an excess of AgNO3 resulted in...

Treatment of a 0.2496-g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.2852 g of AgCl. Calculate the percentage of KCl in the sample? %?

Pick on of the previously discussed psychological disorders and describe a suitable treatment intervention.

in an experiment, 15.0 g of ice at -30 celsius is converted into steam with a...

in an experiment, 15.0 g of ice at -30 celsius is converted into steam with a temperature of 115 celsius. How much energy is required for this process? DHvap= 2260 J/g; DHfus= 334 J/g; cs(ice)= 2.06 J/(g celsius; cs(water)= 4.18 J/(g celsius; cs(steam)= 1.99 J/(g celsius))

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