pH = -log [H+]
Note that pH is equal to −log10c, where c is the hydrogen ion concentration in Molarity units (M) i.e. moles per litre.
[H+] = 10 -pH
Therefore,
At pH = 2.79,
[H+] = 10 -2.79 = 0.001621 M
Now, HNO3 is a strong acid and dissociates completely in aqueous solution as:
HNO3 H+ + NO3-
1 M of HNO3 gives 1 M of H+ ions
Therefore, if 0.001621 M of H+ is present then [HNO3 ] is also = 0.001621 M
The answer should have 3 significant digits. Therefore [HNO3 ] = 1.62 x 10-3 M ...Answer
3 attempts left Check my work Enter your answer in the provided box. Calculate the concentration...
3 attempts left Check my work Enter your answer in the provided box. Calculate the pH at 25°C of a 0.055 M solution of a weak acid that has K, -1.7 x 10.
3 attempts left Check my work Enter your answer in the provided box. Calculate the pH of an aqueous solution at 25°C that is 9.3 x 10 Min HI. pH-
3 attempts left Check my work Enter your answer in the provided box Calculate the pH at 25°C of a 0.0051 M solution of a weak base with a K of 6.8 x 10-9. pH = |
3 attempts left Check my work Enter your answer in the provided box. Calculate the pOH of an aqueous solution of 0.062 M NaOH at 25°C. РОН
Question 11 of 15) value 1.00 points 3 attempts left Check my work Enter your answer in the provided box. solution of NaOH. Calculate the pH of a 1.0 x 10M pH= Question 14 (of 15) value: 1.00 points 3 attempts left Check my work Enter your answer in the provided box. Calculate the pH of a solution with a H2O concentration of: 1.8 x 10-6 M
3 attempts left Check my work Enter your answer in the provided box. ints The pH of a bicarbonate-carbonic acid buffer is 7.06. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-). (Kg, of carbonic acid is 4.2 x 10-7.) eBook [H,C03] [HCO3-] 00 3 attempts left Check my work Enter your answer in the provided box. 01 ints Calculate the pH at the equivalence point in the titration of 50.0 mL...
3 attempts left Check my work Enter your answer in the provided box. What is the component concentration ratio, [CH CO0 VICH COOHl, of a buffer that has a pH of 5.3902 (K of CH,COOH 1.8 x 10 5)
3 attempts left Check my work Enter your answer in the provided box. A solution is made by dissolving 20.3 g of HCl in enough water to make 642 mL of solution. Calculate the pH of the solution at 25°C. 1
3 attempts left Check my work Enter your answer in the provided box. Determine the pH at 25°C of a solution prepared by dissolving 0.0650 mole of sodium acetate in 1.00 L of 0.250 M acetic acid. (Assume that the addition of sodium acetate does not change the volume of the solution.)
3 attempts left Check my work Enter your answer in the provided box. In a 0.731 M solution, a weak acid is 12.5% dissociated. Calculate K, of the acid.