Verb. 1. impel-urge or force (a person) to an action; constrain or motivate. force. cause, do, make-give rise to; cause to happen or occur, not always intentionally; cause a commotion; make a stir; cause an accident.= force) â noetigen; nÃ¶tigen to impel somebody to do â something (jdn) dazu, noetigen nÃ¶tigen etw; zu tun to (impel)somebody in â to action Jdn zum. (= handeln noetigen) â (nÃ¶tigen)drive. on voran treiben
1 Ratio of the salt to the acid or base. 2  The buffer capacity is optimal when the ratio is 1:1; that is, when pH = pKa. 3  Total buffer concentration. 4  For example, it will take more acid or base to deplete a 0.5 M buffer than a 0.05 M buffer.
1 This pH should be within one pH unit from the pKa of the acid/conjugate base. 2  So, you can prepare a buffer at pH 2 or pH 7, for example, but pH 9 would be pushing it. 3  Use the Henderson-Hasselbach equation to calculate how much acid and base you need. 4  You can simplify the calculation if you make 1 liter of buffer. Use the Henderson-Hasselbach equation to calculate how much acid and base you need. 2  You can simplify the calculation if you make 1 liter of buffer. 3  Select the pKa value that is closest to the pH of your buffer.