南加大Marshall商學院本科專業獲STEM認證，有資格申請延長OPT至36個月
2023年美國大學本科秋季入學入學申請已經啟動，名校陸續更新招生政策。U.S. News排名27的南加大好消息頻出！ 首次新增EA輪次 參考鏈接：《USC南加大新增早申EA輪，附南加大申請要求！》 Marshall商學院獲STEM認證...
CIE A Level Chemistry復習筆記5.5.6 Solubility Product
Solubility Product Solubility?is defined as the?number of grams?or?moles?of compound needed to?saturate?100 g of?water, or it can also be defined in terms of 1 kg of water, at a given temperature F...
CIE A Level Chemistry復習筆記5.5.5 Buffer Calculations
Calculating pH of Buffer Solutions The pH of a?buffer?solution?can be calculated using: The?Ka?of the?weak acid The?equilibrium concentration?of the?weak acid?and its?conjugate base?(salt) To deter...
CIE A Level Chemistry復習筆記5.5.4 Buffers
Buffers A?buffer solution?is a solution in which the pH does not change a lot when small amounts of acids or alkalis are added A buffer solution is used to keep the pH almost constant A buffer can ...
CIE A Level Chemistry復習筆記5.5.3 pH & [H+] Calculations
Calculating [H+] & pH If the concentration of H+?of an acid or alkali is known, the?pH?can be calculated using the equation: pH = -log [H+] Similarly, the?concentration?of?H+?of a solution can ...
2023年紐約大學秋季入學申請材料發生變化，更新文書題目及推薦信要求
8月1日，23Fall美本申請系統Common Application正式開放，申請美本的留學生們已經可以開始提交材料，也正式宣告今年的申請季已經正式啟動！ 而在Common Application中，我們還發現多年未更新補充題目的紐約大學（...
CIE A Level Chemistry復習筆記5.5.2 pH, Ka, pKa & Kw Calculations
Calculating pH, Ka, pKA & Kw pH The?pH?indicates the?acidity?or?basicity?of an acid or alkali The pH scale goes from 0 to 14 Acids have pH between 0-7 Pure water is?neutral?and has a pH of 7 Ba...
北京公立國際部高中2022申請季錄取數據分析！
對于考慮國際學校的家庭來說，每個家長都有一套自己的標準。但無論有多少標準最后肯定繞不開的是名校錄取率。2022申請季已經落下帷幕，近期北京國際學校紛紛公布了2022年畢業生大學錄取成績，在疫情的情況下，雖...
CIE A Level Chemistry復習筆記5.5.1 Acids & Bases
Conjugate Acids & Bases A?Br?nsted acid?is a species that can donate a proton For example, hydrogen chloride (HCl) is a Br?nsted acid as it can lose a proton to form a hydrogen (H+) and chlorid...
CIE A Level Chemistry復習筆記5.4.6 Standard Electrode Potentials: Free Energy Change
Calculating Free Energy Change Using Standard Electrode Potentials The?standard free energy change?can be calculated using the standard cell potential of an electrochemical cell ΔG??= - n x?Ecell??...
CIE A Level Chemistry復習筆記5.4.5 Nernst Equation
The Nernst Equation Under non-standard conditions, the cell potential of the half-cells is shown by the symbol?Ecell The effect of changes in?temperature?and?ion concentration?on the?Ecell?can be d...
CIE A Level Chemistry復習筆記5.4.4 Non-Standard Conditions
Effect of Concentration on Electrode Potential Changes in?temperature?and?concentration?of aqueous ions will affect the standard electrode potential (E?) of a half-cell Under these?non-standard con...
