The wall of a glass beaker contains ≡Si-OH groups. Why are dilute solutions of metal ions (pH > 7) NOT prefered to be stored in glass vessels?

Which of the following salts does NOT cause permanent hardness? M8SO, B CaCl, Ca(HCO 3) , D FeCl,

0.281 mol AgNO3 and 3.17 mol NH3 were added to enough water to give 1.00 L of solution at 25 °C. Calculate the equilibrium concentration of free silver ion, [Ag+], in this solution. The formation constant for Ag(NH3)2+ (Kf) = 1.50x107 at 25 °C. 0×100 M 2.75×10-9 M 7.18×10-9 M 2.24×10-9 M 4.97×10-9 M

10-4 mole of Cl2 is added to 1 liter of water at 25 °C. Balance the reaction of Cl2 + H2O = HOCl + HCl What is the pH of the solution? (Ka,HOCl = 3.5 x 10-8)

Calculate the concentration of oxalate ions [C2O42-] in a solution that contains solid silver oxalate, Ag2C2O4, and 0.100 M Ag+. [Ksp(Ag2C2O4) = 1.0 × 10–11]

Use the solubility-product constant for CrCr (OH)(OH) 33 ( KspKsp = 6.7×10−316.7×10−31) and the formation constant for CrCr (OH)(OH) −44− from the following table to determine the concentration of CrCr (OH)(OH) −44− in a solution that is buffered at pHpH= 10 and is in equilibrium with solid CrCr (OH)(OH) 33.Table Formation Constants for Some Metal Complex Ions in Water at 25 ∘C

Calculate the DHLL activity coefficient for Cl- or Fe3+in a solution of FeCl3 that is 0.1 m in concentration. Suppose you dissolve NaCl in a 0.1 m HCI solution so that the final concentration of the salt is 0.2 m NaCl. What will be the DHLL activity coefficients for Na+, H+, and Cl-?

Calculate the equilibrium concentration of Zn2+(aq) in a solution that is initially 0.150 M Zn(NO3)2 and 0.800 M NH3.   The formation constant for [Zn(NH3)4]2+(aq) is Kf = 2.8 × 109.

Suppose the Kc value for Cobalt (II) hexahydrate is 6.80 and suppose upon heating the solution turned pink.  If a group of student started mixed 10.5 mL of a 1.25 M [Co(H2O)6]2+(aq) solution with 12.5 mL of a 1.55 M solution of NaCl(aq) with 15.25 mL of a 1.39 M [CoCl4]-2(aq) solution then what color is the solution at equilibrium?   [Co(H2O)6]2+(aq)  +  4 Cl-(aq)      [CoCl4]-2(aq)  +  6 H2O(L)   Multiple choices   pink   purple   green   black   orange   brown   blue   colorless   yellow   gray   red   green