General Chemistry Answers

A solution of nitric acid contains a concentration of hydrogen ions, H⁺, of 0.1 mol dm^-3. What is the pH value of this acid solution ?

0.171 g of barium hydroxide, Ba (OH) 2 was dissolved in 500 cm³ of distilled water. Pengion occurs completely. What is the pH value of the resulting solution ?

0.73 g of hydrogen chloride gas is dissolved in 1000 cm³ of distilled water. Hydrogen chloride dissolves completely in water. What is the pH value of the resulting solution ?

In terms of intermolecular forces, explain WHY we see this general trend in boiling points, for compounds of equivalent formula mass. How does the presence of a dipole moment affect the strength of intermolecular interactions?

Dinitrogen tetroxide decomposes to form nitrogen dioxide in a second-order reaction: N2O4(g) → 2NO2(g) At 300.0 K, the rate constant for this reaction has been measured to be 1.3 × 108 L/(mol.s). Suppose 0.454 mol of N2O4(g) is placed in a sealed 11.0 L container at 300.0 K and allowed to react, what is the total pressure inside the vessel after 77.0 ns has elapsed? (R = 0.0821 (L atm)/(K mol)) 

A chemist prepares a solution of barium chlorate (Ba(C103)2) by measuring out 1.5x10^2mol of barium chlorate into a 500.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's barium chlorate solution. Round your answer to significant digits.