Complete the table below for the solution at 25 degree C. Which of the following

Question

Complete the table below for the solution at 25 degree C. Which of the following aqueous solutions is least acidic? H_2SO_3 HCl H_2SeO_3 HClO_3. Three acid-base indicators are given below: methyl orange (end point at pH 4) bromthymol blue (end point at pH 7) phenolphthalein (end point at pH 9) Which indicator would you select for the titration of NaF with HC! Arrange the following aqueous 0.1 M solutions in order of increases pH (lowest to highest): KOH, KClO, CrCl_3, KCIO_4 Is the aqueous solution of KH_2PO_4 acidic, basic, or neutral?

Explanation / Answer

2)The acidic properties of the oxyacids of different elements which are in the same oxidation state decreases as the atomic number increases. This is due to increase in size and decrease in electronegativity. HC1O4 > HBrO4 > HIO4 H2SO3 > H2SeO3

HCl and HClO3 are strong acids.

Therefore least acidic solution is H2SeO3.

5)KH2PO4 is neither a base nor an acid but a salt. A salt, usually in crystalline form, is produced via an acid-base chemical reaction. Monopotassium phosphate is the neutralized product of phosphoric acid and potassium hydroxide.

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