Calculate the ph of a solution prepared by dissolving 2.129 g of solid anhydrous na2hpo4 (fw, 141.98) in about 50 ml of water, adding 1.000 ml of 6.00 m hno3, and diluting the mixture with water to 100.0 ml. the stepwise acid dissociation constants for phosphoric acid are 7.11 × 10-3, 6.32 × 10-8, and 7.1 × 10-13. assume the activity coefficients are equal to 1.00.

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)