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19 Nov 2019
For strong electrolytes, pH and pOH are defined by the equations pH = -log_10 [H^+] pOH = -log_10 [OH^-] RED about Ionization constants (K_a - the extent to which a substance dissociates to form ions in water) of electrolytes For weak electrolytes. pH = pKa + log [A]/[HA] pOH = pKb + log[HA]/[A^+] What is the pH of a solution where the H^+ concentration is 0.2mM? Calculate the concentration of Nitric acid (HNO_3) if the pH is 1.7. HNO_3 is a strong acid. Calculate the pH of 0.05 nM KOH (Potassium hydroxide). Note that KOH is a strong electrolyte. What is the stronger acid - acetic acid (CH_3COOH) or phosphoric acid (H_3PO_4)? Reason in terms of Ka values SAFETY PRECAUTIONS You must wear safety goggles. We will be using solutions of acids and bases through out this experiment. Their concentrations are all 0.100 M. Spills can be cleaned by using lots of water. Do not rub your eyes your hands have been thoroughly washed. As always, remember to wash your hands before leaving the
For strong electrolytes, pH and pOH are defined by the equations pH = -log_10 [H^+] pOH = -log_10 [OH^-] RED about Ionization constants (K_a - the extent to which a substance dissociates to form ions in water) of electrolytes For weak electrolytes. pH = pKa + log [A]/[HA] pOH = pKb + log[HA]/[A^+] What is the pH of a solution where the H^+ concentration is 0.2mM? Calculate the concentration of Nitric acid (HNO_3) if the pH is 1.7. HNO_3 is a strong acid. Calculate the pH of 0.05 nM KOH (Potassium hydroxide). Note that KOH is a strong electrolyte. What is the stronger acid - acetic acid (CH_3COOH) or phosphoric acid (H_3PO_4)? Reason in terms of Ka values SAFETY PRECAUTIONS You must wear safety goggles. We will be using solutions of acids and bases through out this experiment. Their concentrations are all 0.100 M. Spills can be cleaned by using lots of water. Do not rub your eyes your hands have been thoroughly washed. As always, remember to wash your hands before leaving the
Collen VonLv2
2 Jun 2019