7.在Pb(NO3)2溶液中,若要以 PbCO3形式沉淀,可加入 Na2CO3或通入 CO2气体,虽然两者都有沉淀生成,但用使 Pb2+沉淀更完全。 这是因为 。 若是用相同浓度的 Na2CO3和(NH4)2CO3作沉淀剂,比的沉淀效果更好,因为 相关知识点: 试题来源: 解析 Na2CO3 通CO2生成H2CO3溶液,电离出的CO 很少,且在生成PbCO3...
2Na+(aq) + CO32-(aq) + Pb2+(aq) + 2NO3-(aq) = 2Na+(aq) + 2NO3-(aq) + PbCO3(s) Spectator Ions Spectator ions are ions that do not take part in the reaction. They are removed from the complete ionic equation to get the net ionic equation. Na+ NO3- ...
Pb2+(aq) + 2NO3-(aq) + 2Na+(aq) + CO32-(aq) = PbCO3(s) + 2Na+(aq) + 2NO3-(aq) Spectator Ions Spectator ions are ions that do not take part in the reaction. They are removed from the complete ionic equation to get the net ionic equation. NO3- Na+ ...
硝酸铅〔Pb(NO3)2〕的稀溶液中滴入几滴稀Na2CO3,生成白色PbSO4沉淀,再滴入数滴饱和醋酸钠溶液,微热,并不断搅拌,沉淀慢慢溶解。以上发生的都是复分解反应,写出反应过程的离子方程式:___。试推测第二步离子反应发生的原因是___。 试题答案 在线课程 解析:Pb2+与反应生成PbSO4,是复分解反应,PbSO4溶解也是阴阳离...
点对应的溶液中,4y+、a-、2+、Na^+ 5向Na,CO:、NaHCO3混合溶液中逐滴加入稀盐酸,生成气体的量随盐酸加入量的变化关系如图所示。则下列离子组在对应的溶液中,一定能大量共存的是(已知Fe2+和NO3在酸性条件下不能共存)n(气体)c da b0n(HCI)A.a点对应的溶液中:Nat、OH、SO、NO3B.b点对应的溶液中:Mg...
(2)有沉淀生成.如Ba2+、Ca2+、Mg2+、Ag+等不能与SO42-、CO32-等大量共存;Mg2+、Fe2+、Ag+、Al3+、 Zn2+、Cu2+、Fe3+等不能与OH-大量共存;Pb2+与Cl-,Fe2+与S2-、Ca2+与PO43-、Ag+与I-不能大量共存.(3)有弱电解质生成.如OH-、CH3COO-、PO43-、HPO42-、H2PO4-、F-、ClO-、AlO2-、...
N2CO3+P)O3, এটি কোন্ ধরনের বিক্রিয়া ? Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparatio...
2Na+(aq) + CO32-(aq) + Ba2+(aq) + 2NO3-(aq) = 2Na+(aq) + 2NO3-(aq) + BaCO3(s) Spectator Ions Spectator ions are ions that do not take part in the reaction. They are removed from the complete ionic equation to get the net ionic equation. Na+ NO3- ...
a Na2CO3 + b Ba(NO3)2 = c Ba2(CO3)2 + d NaNO3 Step 2: Create a System of Equations Create an equation for each element (Na, C, O, Ba, N) where each term represents the number of atoms of the element in each reactant or product. Na: 2a + 0b = 0c + 1d...
12. 室温下, 通过矿物中 PbSO4获得 Pb(NO3)2的过程如下: D Na2CO3溶液HNO3PbSO4 脱硫 →PbCO3→溶解Pb(NO3)2已知: K_(sp)(PbSO_4)=1.6*10^(-8) , K_(sp)(PbCO_3)=7.4*10^(-14)cm 下列说法正确的是 A. Na_2CO_3 溶液中: c(OH^-)c(H_2)+c(HCO_3^-)+c(H_2CO_3) B.反...