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Write a flow chart for the separation and identification of Ag+, Bi3+, and Ni2+
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- A standard solution contains 100 ppm of Fe, which was found to have an absorbance of 0.151 au at 508 nm after the addition of 1,10-phenanthroline, pH 4 buffer, and hydroxylamine. Then, a water sample treated similarly exhibited an absorbance of 0.109 au. Which of the following statements is true? (A) The Fe concentration of the water sample is higher than 100 ppm. B) The Fe concentration of the water sample is equal to 100 ppm. It is impossible to estimate the Fe content of the water sample from information presented. D) The Fe concentration of the water sample is lower than 100 ppm.7.00 mL of 5.00 x 103 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 6.00 mL of 7.00 x 10-3 M KSCN (7.00 times 10 to the minus 3rd power M KSCN) along with 4.00 mL of water. The concentration of [F e(SCN)2+] was found to be 3.00 x 10-3 M (3.00 times 10 to the minus 3rd power M) at equilibrium. How many initial moles of F e3+ a decimal number (no exponents). are present in the solution? Express your answer asJanine's research focuses on the ability of quercetin, a flavonoid and natural dye, to detect the presence of Co2+ in wastewater samples. She prepared a set of calibration standard solutions by adding an excess of quercetin to solutions of varying Co2+ concentration and maintaining it at pH 6.4 using a Tris-HCl buffer. The reaction yields a colored complex solution that has a maximum absorbance at 440 nm:Co2+ + 2 Quercetin --> Co(Quercetin)22+ The absorbance measurements for the calibration solutions prepared are shown in the tables; a cuvette with a 2.50 cm path length was used. [Co2+], in M Absorbance Color Wavelength range (nm) 0.05 0.100 Red 625-740 0.10 0.166 Orange 590-625 0.20 0.285 Yellow 565-590 0.30 0.367 Green 490-565 0.40 0.454 Blue 440-490 0.50 0.571 Violet 380-440 Part of her research is to determine the extent of Co2+ pollution in a stream near a pharmaceutical company. She obtained a 50.0-mL sample of the stream water and buffered it to pH 6.4. She…
- 7.00 mL of 6.00 x 103 M Fe(NO3)3 (6.00 times 10 to the minus 3rd power MFe (NO3)3) is added to 4.00 mL of 8.00 x 103 M KSCN (8.00 times 10 to the minus 3rd power M KSCN) along with 7.00 mL of water. The concentration of [F e(SCN)2+] was found to be 1.00 x 103 M (1.00 times 10 to the minus 3rd power M) at equilibrium. How many initial moles of SCN (SCN minus) are present in the solution? Express your answer as a decimal number (no exponents). Your Answer: Answer units7.00 mL of 8.00 x 10³ M Fe(NO3)3 (8.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 6.00 mL of 4.00 x 103 M KSCN (4.00 times 10 to the minus 3rd power M KSCN) along with 3.00 mL of water. The concentration of [F e(SCN)2] was found to be 1.00 x 104 M (1.00 times 10 to the minus 4th power M) at equilibrium.How many moles of Fe+ are present in the solution at equilibrium? Express your answer as a decimal number (no exponents).5.00 mL of 7.00 x 103 M Fe(NO3)3 (7.00 times 10 to the minus 3rd power MF (NO3)3) is added to 7.00 mL of 4.00 x 103 M KSCN (4.00 times 10 to the minus 3rd power M KSCN) along with 5.00 mL of water. The concentration of [F e(SCN)2+] was found to be 1.00 x 103 M (1.00 times 10 to the minus 3rd power M) at equilibrium. How many initial moles of F e3+ are present in the solution? Express your answer as a decimal number (no exponents). Your Answer: Answer units
- You are given a solution that contains a mixture of the following cations: Ag+, Ba2+, Mn2+ and Cu2+. Draw a flow chart to show how these cations are separated and indicate specific reagents used in each separation step.8.00 mL of 6.00 x 10-3 M Fe(NO3)3 (6.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 8.00 mL of 8.00 x 103M KSCN (8.00 times 10 to the minus 3rd power M KSCN) along with 7.00 mL of water. The concentration of [F e(SCN)2+] was found to be 1.00 x 10-3 (1.00 times 10 to the minus 3rd power M) at equilibrium. How many initial moles of SCN (SCN minus) are present in the solution? Express your answer as a decimal number (no exponents). M Your Answer: Answer units4.00 mL of 4.00 x 103 M Fe(NO3)3 (4.00 times 10 to the minus 3rd power MFe (NO3)3) is added to 9.00 mL of 6.00 x 103 M KSCN (6.00 times 10 to the minus 3rd power M KSCN) along with 3.00 mL of water. The concentration of [F e(SCN)2+] was found to be 1.00 x 10-4 M (1.00 times 10 to the minus 4th power M) at equilibrium.How many moles of [F e(SCN)2+] are present in the solution? Express your answer as a decimal number (no exponents). Your Answer: Answer units
- 8.00 mL of 5.00 x 10³ M Fe(NO3)3 (5.00 times 10 to the minus 3rd power MFe (NO3)3) is added to 4.00 mL of 4.00 x 103 M KSCN (4.00 times 10 to the minus 3rd power M KSCN) along with 6.00 mL of water. The concentration of [F e(SCN)2+] was found to be 2.00 x 10-4 M (2.00 times 10 to the minus 4th power M) at equilibrium.How many moles of F e3+ are present in the solution at equilibrium? Express your answer as a decimal number (no exponents). Your Answer: Answer units7.00 mL of 5.00 x 10-3 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 6.00 mL of 7.00 x 10-3 M KSCN (7.00 times 10 to the minus 3rd power M KSCN) along with 4.00 mL of water. The concentration of [F e(SCN)2+] was found to be 2.00 x 10-4 M (2.00 times 10 to the minus 4th power M) at equilibrium.How many moles of F e3+ are present in the solution at equilibrium? Express your answer as a decimal number (no exponents). Your Answer: Answer unitsWhy is EDTA an appropriate titrant for the determination of water hardness?