Supply coeffcients that balence the atoms and ions. Supply electrons (e-) that balence the charges. Balence the half-equation 1. Pb^2+ -> Pb^4+ ........ 2.  ....... + Cl2 -> .......... Cl^- Blanence the following equation 3. ....... ClO3^- -> ........ Cl^- + ........ O2 4. ........ Al +........ Fe^2+ -> ......... Al^3+ + ........ Fe

Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production of uranium, titanium, and other active metals) is isolated from sea water by the following sequence of reactions: Mg2+(aq)+Ca(OH)2(aq)Mg(OH)2(s)+Ca2+(aq)Mg(OH)2(s)+2HCl(aq)MgCl2(s)+2H2O(l)MgCl2(l)electrolysisMg(s)+Cl2+Cl2(g) Sea water has a density of 1.026 g/cm3 and contains 1272 parts per million of magnesium a5 Mg2+(aq) by mass. What mass, in kilograms, of Ca(OH)2; is required to precipitate 99.9% of the magnesium in 1.00103 L of sea water?

Consider the equation G = -nF. What are the four terms in this equation? Why does a minus sign appear in the equation? What does the superscript o indicate?

ow do chemists know that the ions behave independently of one another when an ionic solid is dissolved in water?

Physiological saline concentration—that is, the sodium chloride concentration in our bodies—is approximately 0.16 M . A saline solution fur contact lenses is prepared to match the physiological concentration. If you purchase 25 mL of contact lens saline solution, how many grams of sodium chloride have you bought?

What is a half-reaction? Why must the number of electrons lost in the oxidation half-reaction equal the number of electrons gained in the reduction half-reaction? Summarize briefly the steps in the half-reaction method for balancing redox reactions. What two items must be balanced in a redox reaction (or any reaction)?

A 2.5624-g sample of a pure solid alkali metal chloride is dissolved in water and treated with excess silver nitrate. The resulting precipitate, filtered and dried, weighs 3.03707 g. What was the percent by mass of chloride ion in the original compound? What is the identity of the salt?

0 Cals) + NAC lag) – O White the balanced molecular chemical equation for the reachion f Solid lithium with aqueo us Chromium (111) acetat: 4 no iea chun occurs, write UR. Idaite a balanced molecular Chemical equahion for the Solia Sodium with aqueous Zinc perchlorite . 7 no geaction ccuns,

(d) Br. e 0.. K :Q'Bu

(Last Day Promotio... Kronos Worktorce... Maame Acheampo... MIDTERM M [Review Topics] [References] Use the References to access important values if needed for this question. How many grams of Ag,CO3 will precipitate when excess Na,CO3 solution is added to 77.0 mL of 0.690 M AGNO, solution? 2AGNO3(aq) + Na,CO3(aq) Ag,CO3(s) + 2NAN03(aq) + 2NaNO3(aq) Submit Answer Retry Entire Group 9 more group attempts remaining