Pb(NO3)2(aq)→ Pb2+(aq)+2NO3-(aq) Na2S(aq)→2Na+(aq)+ S2-(aq) 2NO3Na(aq)→2Na+(aq)+2NO3-(aq) Pb2+(aq)+2NO3-(aq)+2Na+(aq)+ S2-(aq)= PbS(s)+2Na+(aq)+2NO3-(aq) Spectator Ions Spectator ions are ions that do not take part in the reaction. They are removed ...
Balance Pb(NO3)2 + Na2S + H2O = Pb(NO3)2 + Na2S + H2O by inspection or trial and error with steps. Step 1: Count the number of each element on the left and right hand sides Reactants (Left Hand Side)Products (Right Hand Side) ...
D. 向A点处的PbI2溶液中加入100mL 2×10-3mol/L的Na2S溶液,平衡后溶液中的c(Pb2+)<4×10-3mol/L 免费查看参考答案及解析 题目: (12分) 如图,三棱锥P﹣ABC中,底面ABC是边长为2的正三角形,PA⊥PC,PB=2. (1)求证:平面PAC⊥平面ABC; (2)若,求三棱锥P﹣ABC的体积. 免费查看参考答案及解析 题目...
Write a balanced equation for the following reaction: HI(aq) + NaHCO3(aq) arrow Predict the products of the following reaction by completing and balancing the reaction equation. If no reaction occurs, explain why. Al(NO3)3(aq) + Pb...
分析:PbI2的饱和溶液中存在沉淀溶解平衡:PbI2(s)?Pb2+(aq)+2I-(aq),此反应的Ksp=c(Pb2+)×c2(I-),依据图象得知:常温下Ksp=2×10-3×(1×10-3)2此常数只与温度有关,据此解答即可. 解答: 解:A、常温下,PbI2的Ksp=1×10-3×(2×10-3)2=4×10-9,故A错误;B、在温度不变时,向PbI2饱和溶液...
解答: 解:溶度积常数表达式符合Ksp=[c(Ax+)]2?c(By-),根据溶度积常数知,该物质属于难溶物,阳离子浓度是阴离子浓度的2倍,即阳离子计量数是阴离子计量数的2倍,A.该电离方程式中阴阳离子计量数相等,不符合条件,故A错误;B.该电离方程式中阳离子计量数是阴离子的2倍,但Na2S属于易溶于物不是难溶物,不符合...
Answer and Explanation:1 The solubility equilibrium of {eq}\rm PbI_2 {/eq} is shown below: {eq}\rm PbI_2(s)\rightleftharpoons Pb^{2+}(aq)+2I^-(aq) {/eq} Hence, the...
溶度积常数表达式符合Ksp=[c(Ax+)2·c(By-)的是( ) A. AgCl(s)、一Ag+(aq)+Cl-(aq) B. Na2S、一2Na++S2- C.
[题目]化工生产中常用FeS作为沉淀剂除去工业废水中的Pb2+.反应原理为FeS+Fe2+(aq).下列有关叙述错误的是( )A.达到平衡时.cB.KspC.该反应的平衡常数K=D.溶液中加入少量Na2S固体后.c减小
溶度积常数表达式符合Ksp=·c(By-)的是( )A.AgCl(s)Ag+(aq)+Cl-(aq)B.Na2S2Na++S2-C.Ag2S(s)2Ag+(aq)+S2-(aq)D.PbI2(s)Pb2+(aq)+2I-(aq)