Chemistry, 09.04.2020 00:34, breanna7667
A solution is prepared by dissolving 0.23 mol of nitrous acid and 0.27 mol of sodium nitrite in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the present in the buffer solution. The Ka of nitrous acid is 1.36 Γ 10-3.A) H2OB) H3O+C) nitrite ionD) nitrous acidE) This is a buffer solution: the pH does not change upon addition of acid or base.
Answers: 2
Chemistry, 22.06.2019 13:30, citlalli30
1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6
Answers: 2
Chemistry, 22.06.2019 19:10, krisandlance
Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m
Answers: 1
Chemistry, 22.06.2019 23:30, sanociahnoel
The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point
Answers: 1
A solution is prepared by dissolving 0.23 mol of nitrous acid and 0.27 mol of sodium nitrite in wate...
Mathematics, 08.10.2020 06:01
Mathematics, 08.10.2020 06:01
Mathematics, 08.10.2020 06:01
Mathematics, 08.10.2020 06:01