Precipitation of lead hydroxide Pb(OH)2on the inside wall of water pipes is used to decrease the concentration of disso...
2. Applying fundamental chemistry concepts to potable water treatment. Precipitation of lead hydroxide Pb(OH)2 on the inside wall of water pipes is used to decrease the concentration of dissolved lead (Pb2+) in drinking water. Assume that a water treatment plant adjusts the pH of the finished drinking water before it enters the water distribution system, which contains old lead pipes. Which pH would result in a lower concentration of dissolved lead in drinking water: pH 7 and pH 8? Prove...
The Ksp for lead ii hydroxide Bs(OH)2 is recorded as 3.811 × 10 7. What should the pH of a saturated solution be? If the molar solubility of the base is 2.85 102, what concentration of hydroxide is dissolved in a Consider the slightly soluble base Bs(OH)2. saturated solution? Preview
8. Precipitation calculations with Ni2+ and Pb a. Use the solubility product for Ni(OH)2 o) to calculate the ph at which (OTH)2 begins to precipitate from a 0.18 M Ni2+ solution (3pts). (Ksp Ni(OH)2-5.5x10-16) b. Will Pb(OH) H from a0.18M Pb2 solution (3psa)? (The 2 (o) precipitate at the above p Ks for Pb(OH)2 1.2x10-15) The functional significance of the evolution of a second ventricle (as seen in alligators &their relatives, birds, & mammals) is that a second ventricle allows...
Magnesium (Mg2+) makes water hard, which prevents soaps and detergents for working properly. Therefore, drinking water treatment plants use precipitation to reduce the concentration of magnesium in the treated water. What pH is required to reduce a high concentration of dissolved Mg2+ to 25 mg/L? The solubility product for the following reaction is 10−11.16: Mg(OH)2(s) = Mg2+(aq) + 2OH−(aq).
1. In which solution will aluminum hydroxide, Al(OH)3, be least soluble? The solutions are similar except that they have the following pH values: Hint: Common ion effect. Which two ions dictate acidity and basicity? a. 3 b. 7 c. 9 d. 11 2. Potassium perchlorate has a solubility product constant of 10-2. Which is true about the following solution of KClO4: [K+] = 0.01 M, [ClO4 −] = 0.01 M a. Ksp < Q and no precipitation occurs b....
6. Given a total dissolved lead concentration of 2.0x10-5 M, a total dissolved NTA concentration of 2.0x10-2 M, and a pH of 12.3 (note extreme pH) a. Under these conditions, what is the dominant form of NTA? b. Write an equation for total dissolved NTA and for total dissolved Pb. What assumptions can you make? c. Calculate the predicted [Pb2+], considering NTA complexation only? d. What is the [Pb2+] as predicted by the solubility of Pb(OH)2(s) at pH 12.3? e....
The following primary standards can be used for the standardization of bases except. a. Benzoic acid b. Oxalic acid c. CaCO3 d. KHP A solution that may contain NaOH, Na 2CO3, and NaHCO3, alone or in compatible combination was titrated with 0.1200 M HCl. The volume of the acid required to reach the phenolphthalein endpoint was 25.67 mL while 38.13 mL to reach the methyl red endpoint. What are the components of the mixture? a. Na2CO3 only b. NaOH only...