Measuring and Comparing pH Strong and weak acids The relative strengths of different acids can be determined by measuring the pH of equimolar aqueous solutions of the acids, at the same temp...
Ionic Product of Water, Kw In all aqueous solutions, an equilibrium exists in water where a few water molecules dissociate into protons and hydroxide ions We can derive an equilibrium consta...
Acid Dissociation Strong acids A strong acid is an acid that dissociates almost completely in aqueous solutions HCl (hydrochloric acid), HNO3 (nitric acid) and H2SO4 (sulfuric acid) The posi...
Defining pH The acidity of an aqueous solution depends on the number of H+ ions in solution The pH is defined as: pH = -log[H+] where [H+] is the concentration of hydrogen ions in mol dm–3 S...
Brønsted–Lowry Acid & Base Theory The Brønsted-Lowry Theory defines acids and bases in terms of proton transfer between chemical compounds A Brønsted acid is a species that can donate a ...
我们选择国际学校，更多还是为了以后出国留学，但是如今日新月异的社会趋势，选择一个适合自己的专业，更是尤为重要。下面，我们就来一起盘点看看英国留学十大高就业率专业，里面有没有你中意的那一个~ 10商务研...
Temperature & the Equilibrium Constant Changes in temperature change the equilibrium constants Kc and Kp For an endothermic reaction such as: An increase in temperature: [H2] and [...
Equilibrium Constant Calculations Calculations involving Kc In the equilibrium expression each figure within a square bracket represents the concentration in mol dm-3 The units of Kc therefo...
AMC由美国数学协会（MAA）举办，起源于1950年，旨在为美国参加国际数学奥林匹克的国家队选拔人才。AMC 2022年报名已开启，距离AMC10/12还有不到两个月的复习时间。 美国AMC学术活动介绍 AMC全名为American Mathem...
AMC是美国数学思维活动（American Mathematics Competitions）的简称，是一项面向世界中学生的数学思维训练，目前每年全球有超过6000所学校的30万名学生参加该活动，是当今世界上最科学、最权威、最具信誉度的数...
AMC是美国数学思维活动（American Mathematics Competitions）的简称，是一项面向世界中学生的数学思维训练，目前每年全球有超过6000所学校的30万名学生参加该活动，是当今世界上最科学、最权威、最具信誉度的数...
AMC由美国数学协会（MAA）举办，起源于1950年，旨在为美国参加国际数学奥林匹克的国家队选拔人才。AMC 2022年报名已开启，距离AMC10/12还有不到两个月的复习时间。 作为含金量最高的数学学术活动之一，在标化成绩...
