General Chemistry Answers

2.

a) Calculate the pH of a 0.015 M aspirin solution when its acid constant is K_a = 2.6 ∙ 10-5 mol/l.

b) The chemist suspected that the concentration of the aspirin solution was not accurate. So he decided to titrate 20 ml of aspirin solution with 0.05 M NaOH solution. The titration results are attached in the table. Draw the titration curve and mark the equivalent point on it. In addition, write the reaction equation and calculate the concentration of the aspirin solution tested.

1. Suppose the voltage rating of a batter is 180 V and the resistance are R1 R3-19 0 a What is the equivalent resistance? |2| = 3.20 , R2-780, b. What is the current through the circuit?

What is the molarity of a solution that has 0.75L of 0.25M Na2SO4

How many moles of sodium chloride would be in 2L of a 5M aqueous solution of sodium chloride?

How many moles of CaCl2 will be produced from 1.4 moles of HCl reacting with calcium hydroxide?

Find the total pressure for a mixture that contains three gases with partial

pressures of 5.00 kPa, 4.56 kPa, and 1.20 kPa?

2feBr3+3CaBr2+2fe

what are the products of the following double displacement reaction?

Na3PO4 (aq) + Cu(NO3)2 (aq) —>

Why does diffusion not require energy?

Un échantillon de gaz de 65,4 ml à une pression de 52,8 kPa est comprimé à un certain volume à 2,5 atm. Quel est le nouveau volume (en litres) ?