The pH value has no relation to the acid - alkali reaction 相关知识点: 试题来源: 解析 A。解析:在酸碱反应实验中,反应后pH值接近7。A选项说酸碱相互中和了,因为pH值接近7表示溶液接近中性,符合酸碱中和的结果。B选项说溶液变得更酸,与pH值接近7矛盾。C选项说溶液变得更碱,也与pH值接近7矛盾。D选项说...
afilamentous 纤维状[translate] aNot applicable. 不可适用。[translate] a31 Dec 12月31日[translate] aHyd rogen concentration created on a scale from 0-14, where a pH of less than 7 is an acid, 7 is neutral, and higher than 7 is an alkali,” 动水学在一等级创造的rogen集中从0-14,酸碱...
Chengrong has been the of Financial manger since Two thousand nine 正在翻译,请等待... [translate] aHydrogen concentration created on a scale from 0-14, where a pH of less than 7 is an acid, 7 is neutral, and higher than 7 is an alkali,” 在一等级创造的氢含量从0-14,酸碱度少于7是...
6.04.4.1.1 Direct substitution by sulfinic acid anion Direct substitution in a wide variety of electrophiles with the use of sulfinic acid salts 104 and various reaction conditions has been extensively investigated for relatively long time and still is found to be an attractive synthetic method Ther...
Which amino acid has a charged polar side chain and which has an uncharged polar side chain at pH 7?Classification of Amino Acids:Amino acids are composed of a carboxyl group, an amino group, and a varying side chain that allows identification of the mono...
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The effect of an increase in pH is shown analytically in Equation (2) [44]. This can also be explained by the pKa of the ammonium ion as a weak acid, which is 9.2 [47]. At a pH higher than this pKa, the concentration of FA is greater than the concentration of NH4+ ions, which...
A buffer that contains 0.370 M base and 0.234 M of its conjugate acid has a pH of 9.09. What is the pH after 0.002 mol of HCl is added to 0.250 L of this solution? A buffer that contains 0.15 M of an acid, HA, and 0.38 M of...
Sampling vessels were acid-washed and deionized water-rinsed thoroughly in the laboratory before the field sampling. Samples for analyzing major cations and trace elements were filtered into 100 mL high-density polyethylene (HDPE) bottles and acidified to pH < 2 by using 6 mol/L purified-HNO3. ...
A system and method are disclosed for increasing the concentration of hypochlorous acid in a quantity of water. Acid is injected into chlorinated water to decrease the pH of the chlorinated water. By decreasing the pH, the hypochlorite/hypochlorous acid equilibrium of the chlorinated water is ...