Calculate the initial concentration of  Fe ion in the solution below.   Fe3+ (aq) + SCN– (aq)  ⇌  FeSCN2+ (aq)   Beaker number 0.200 M Fe(NO3)3 (mL) 0.00200 M SCN– (mL) H2O (mL) 1 9.54 6.26 33.9

What is the pH of the solution that results from the mixing of 250.0 mL of 0.350 M HCl and 100.0 mL of 0.100 M Mg(OH)2? 0.569 0.655 O 0.715 0.956 O 1.17 none of these

Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 3.00 ✕ 102 mL of solution and then titrate the solution with 0.148 M NaOH. C6H5CO2H(aq) + OH-(aq)  C6H5CO2-(aq) + H2O(ℓ) What are the concentrations of the following ions at the equivalence point? Na+, H3O+, OH-C6H5CO2-   M H3O+  M OH-

1. THE SHIFTING OF AN EQUILIBRIUM: THE COMMON ION EFFECT Weak Acids and Weak Bases • • • Let us now examine weak acids and weak bases from an equilibrium point of view. In a solution of the weak acid, HC2H3O2, the following equilibrium exists: HC2H3O2 (aq) H+ (aq) + C2H3O2 (aq) To 3 mL of 0.10 M HC2H3O2 add a drop of methyl orange, then add 1 M NaC2H3O2 a few drops at a time, with mixing. Explain your observations in terms of the equilibrium equation and the common ion effect. Write the equilibrium equation and explain your observations in terms of the equilibrium equation and the common ion effect in your notebook.

A solution is made that is 1.5×10−3 M in Zn(NO3)_2 and 0.180 M in NH3. After the solution reaches equilibrium, what concentration of Zn^(2+)_(aq) remains?

Please answer all 3 questions

Does pH (H+/OH-balance) affect the movement of Polident molecules in solutions? Does Polident contain acidic or basic ingredients? How will the Polident ingredients interacts with the H+/OH- balance in the different pH solutions?

In titrating HC2H3O2 (aq) with 0.1 M NaOH, the equivalence point in pH units will be   A. lower than 7 due to hydrolysis of HC2H3O2  B. lower than 7 due to hydrolysis of Na+  C. higher than 7 due to hydrolysis of C2H3O2-  D. equal to 7 since the acid and base are completely neutralized at the equivalence point.

1b.

what is the equilibrium expression for 2HCN(aq)+Mg(OH)2(aq)--> MgCn2(aq)+2H2O(l)