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A mixed solution containing Cl- and CrO42- ions, both at concentrations of 0.10 mol·L-1, was gradually driped into AgNO3 solution (ignoring changes in volume). Which of the following statements is true. ( ).[KspӨ(AgCl)=1.77×10-10,KspӨ(Ag2CrO4)=1.12×10-12]

A. Red precipitate, and then form white precipitate
B. White precipitate, and then form red precipitate
C. The simultaneous formation of red and white precipitates
D. Cannot be determined

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The discoloration of fluorescent yellow indicator is adsorbed by Ag+ adsorbed precipitation particles because of its negative ions.

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CrCl3·6H2O added into AgNO3, 2/3 chlorine was extracted, and forming a complex with bright green positive octahedral configuration. So its structural formula is ()

A. [Cr(H2O)6]Cl3
B. [Cr(H2O)5Cl]Cl2·H2O
C. [Cr(H2O)4Cl2]Cl·2H2O
D. [Cr(H2O)3Cl2 ]Cl·3H2O

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When EDTA directly titrates nonferrous metal ions, the end point will take on the color ( ).

A. The color of the indicator - metal ion complex
B. Color of EDTA-metal indicator complexes
C. The color of the free indicator
D. The color of the free indicator and the mixed color of the EDTA-metal indicator complex

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Using phenolphthalein as the indicator, the solution of H3PO4 was neutralized at 10.00 mL with 0.1 mol/L NaOH solution ( ) mL.

A. 2.00
B. 3.00
C. 10.00
D. 20.00

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A mixed solution containing Cl- and CrO42- ions, both at concentrations of 0.10 mol·L-1, was gradually driped into AgNO3 solution (ignoring changes in volume). Which of the following statements is true. ( ).[KspӨ(AgCl)=1.77×10-10,KspӨ(Ag2CrO4)=1.12×10-12]

A. Red precipitate, and then form white precipitate B. White precipitate, and then form red precipitate C. The simultaneous formation of red and white precipitates D. Cannot be determined

The discoloration of fluorescent yellow indicator is adsorbed by Ag+ adsorbed precipitation particles because of its negative ions.

CrCl3·6H2O added into AgNO3, 2/3 chlorine was extracted, and forming a complex with bright green positive octahedral configuration. So its structural formula is ()

When EDTA directly titrates nonferrous metal ions, the end point will take on the color ( ).

Using phenolphthalein as the indicator, the solution of H3PO4 was neutralized at 10.00 mL with 0.1 mol/L NaOH solution ( ) mL.

A. Red precipitate, and then form white precipitate
B. White precipitate, and then form red precipitate
C. The simultaneous formation of red and white precipitates
D. Cannot be determined