5. Write the anode and cathode reactions for a galvanic cell that utilizes the reaction: Ni+2Fe¹ → Ni²+ + Fe²+

3. Why does the temperature of the boiling solution have to be measured over a specific time interval, and not the moment you observe boiling?

4 - The standard enthalpy of formation for water is negative. What can you say about the reaction? If I mix the reagents (molecular hydrogen and molecular oxygen) nothing happens. Could you explain the reason? (1.5 points)

H+ equals OH- pH values of basic (alkaline solution) pH values of acidic solution Progressing from weak to strong acid Progressing from weak to strong base Result of adding H+ to a solution

Buffers Substances that change_____in pH. _____H+ when pH is to low (acidic). _______H+ when pH is to high (basic).

4. Evaporative cooling 1. Related to "high heat of vaporization". 2. Water can absorb a great deal of heat before___

7. Determine the empirical formula for a compound having 31.1% potassium 28.9% chlorine, and 40.0% oxygen. b) If the molar mass of this compound is 245.2 g/mol, what is the molecular formula?

Part C-Polarity Demonstration The results for the demonstration for polarity of various substances presented in the image below. Note that each vial has two liquid layers, water and oil. (Oil is a hydrocarbon chain.) Use this image to complete the following question.

10. How many grams of Mg(OH)2 are required to make a 550.0 mL solution with a concentration of 0.725 mol/L?

8. Calculate the concentration of 85.9 moles of copper II sulfate, CuSO4, when it dissolves in 600.0 mL of water.