Web碱的碱性强弱表是什么 k→na对应的氢氧化物为可溶性强碱[ca（oh）2微溶]。mg→cu对应的氢氧化物为难溶性弱碱[al（oh）3、zn（oh）2为两性氢氧化物]。hg→au对应的氢氧化物不存在或不稳定、易分解。k→na对应的氢氧化物不易分解。mg→fe... Weba.酸性：hclo 4 ＞hbro 4 ＞hio 4 b.碱性：naoh＞mg(oh) 2 ＞al(oh) 3 C.稳定性：PH 3 ＞H 2 S＞ HCl D.非金属性：F＞O＞S 5、X元素的阳离子和Y元素的阴离子具有相同的核外电子结构，下列叙述正确的是( )
Chemical Reactions Flashcards Quizlet
WebAnswer (1 of 3): First write the full “molecular” equation showing states 2HClO4(aq) + Mg(OH)2(s) → Mg(ClO4)2 (aq) + H2O(l) Now write the full ionic equation showing states … Web5. Find the pH and % hydrolysis of 0.1 M NaNO2 Na+ is the salt of a strong base (NaOH) and NO 2 – is the salt of a weak acid (HNO 2). Therefore this salt will make the solution basic. Use the Ka of HNO2 and switch it to a Kb. Kb = 1x10-14/4.5x10-4 = 2.2x10-11 []OH KbC − = [OH−]=×(2.2 10−11)(0.1) = 1.48x10-6 M pOH = -log(1.48x10-6) = 5.82 pH = 14 … secured bonds def
List of 50 balanced chemical equation - Toppr
WebTABLE OF CONJUGATE ACID-BASE PAIRS Acid Base K a (25 oC) HClO 4 ClO 4 – H 2 SO 4 HSO 4 – HCl Cl– HNO 3 NO 3 – H 3 O + H 2 O H 2 CrO 4 HCrO 4 – 1.8 x 10–1 H … Web2 (aq) + H 2 O (l) Make sure you balance the equation. Molecular equation: Cu(OH) 2 (s) + 2HClO 4 (aq) → Cu(ClO 4) 2 (aq) + 2H 2 O (l) To write the net ionic equation, split aqueous solutions into their component ions. The solid Cu(OH) 2 (s) in the reactants remains intact! Cu(OH) 2 (s) + 2H + (aq) + 2ClO 4-(aq) → Cu2+ (aq) + 2ClO 4-(aq ... Web④因h 2 o、ch 3 cooh、hcl的电离程度：hcl＞ch 3 cooh＞h 2 o，所以结合质子能力oh-＞ch 3 coo-＞cl-，故④正确； 故选C． 点评 本题考查元素周期律知识，侧重于学生的分析能力和基本概念的理解和运用的考查，注意元素的性质与对应单质、化合物的关系，把握元素周期 ... purple and green deco mesh wreath