chem help

In the chemical plating experiment zinc powder is dissolved in a hot NaOH solution to form sodium zincate according to the following reacton: Zn(s) + 2NaOH(aq) Na2ZnO2(aq) + H2(g) Answer true or false for each of the following statements regarding the rea...

What is the sequence by which the cations below will precipitate out of solution as the pH is raised? (Ksp of: Cu(OH)2=4.8x10-20, Sn(OH)2=3x10-27, Cr(OH)3=1.6x10-30) a. Cu(OH)2, Sn(OH)2, Cr(OH)3 b. Sn(OH)2, Cu(OH)2, Cr(OH)3 c. Sn(OH)2, Cr(OH)3, Cu(OH)2 d....

1. What is the value of Ksp if a saturated solution of PbCO3 is 2.72x10-7M? a. 5.2x10-4 b. 7.4x10-14 *** c. 1.5x10-33 d. 2.7x10-7 (2.72 * 10^-7)(2.72 * 10^-7)= 7.4 * 10^-14

1. Gibb's Free Energy is a. the spontaneous energy of a reaction *** b. the chemical energy that can be used for performing work c. the non-spontaneous energy of a reaction d. the amount of activation energy needed for a reaction to start 2. Which reactio...

can you explain where did the 2 come from also the 3, i'm not an expert at chemistry and i need explaination to see how to do these problems. thank you

Is 1 b?