利用废铁屑(含少量铁锈— —Fe2O3)制备纳米Fe3O4的流程如下:稀HC1 调节pH=12溶液A NaOH(aq)废铁屑纳米适量试剂X(Fe, Fe3)△FeO用如图装置制备溶液A,其实验步骤为:盐酸K1k3京C G水香k DE I.打开k1,关闭k2,并打开k3,缓慢滴加盐酸;II.当...时,关闭k3,对装置E进行读数操作:III.关闭k1,打开k2、...
20.(12分)利用废旧白铁皮(含Fe、Zn、Fe2O3、ZnO)制备磁性Fe3O4胶体流程如下:NaOH(aq)稀硫酸NaOH(aq) N2￥自★碱溶→抽滤洗溶液B酸溶部分FeO氧化(含Fe2+、Fe3+)胶体溶液A牛(含ZnO3)适量NaCIO (aq)I ⅢⅢIV VVI已知:锌及其化合物的性质与铝及其化合物的性质具有一定的相似性。请回答:(1)步骤I碱溶...
Ionic charges are not yet supported and will be ignored. Replace immutable groups in compounds to avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. Compound states [like (s) (aq) or (g)] are not...
C.2Ag+(aq)+Cd(s)2Ag(s)+Cd2+(aq) D.2Ag+(aq)+Co(s)2Ag(s)+Co2+(aq) 下列溶液中微粒浓度关系一定正确的是( ) A.均为0.10mol·L-1 NH4Cl和NH4HSO4溶液,c(NH4+)前者小于后者 B.25℃时NH4Cl溶液的KW大于100℃时NH4Cl溶液的KW C.25℃时pH=11的NaOH和pH=11的氨水分别稀释100倍后的pH前者一...
C、NaOH(aq)+HCl(aq)=NaCl(aq)+H2O(l) NaOH(aq)+ 1 2H2SO4(aq)= 1 2Na2SO4(aq)+H2O(l) D、C(s)+ 1 2O2(g)=CO(g) C(s)+O2(g)=CO2(g)当光束通过下列分散系时,可能产生丁达尔效应的是( ) A、NaHCO3溶液 B、蔗糖溶液 C、CuSO4溶液 D、Fe(OH)3胶体铝...
(2)如果以MgSO4(s)和FeCl3(s)为原料制备9.0gMgO•2Fe2O3,在制取过程中至少需要1mol/L的NaOH(aq) ___ ___mL.(3)在一次制备Fe3O4的实验中,由于反应物比例控制不当,获得了另一种产品.取a克该产品溶于100mL盐酸(足量)中,需要通入672mL(标准状况)Cl2才能把溶液中的Fe2+全部氧化为Fe3+,然后蒸...
(4)已知:常温下常温下Ksp(CuS)=1.3×10-36,H2S的电离常数Ka1=1.3×10-7,Ka2=7.1×10-15,计算Cu2+(aq)+H2S(aq)⇌CuS(s)+2H+(aq)的平衡常数为K=(c^2(H^+))/(c(Cu^(2+))•c(H_2S))=(c^2(H^+))/(c(Cu^(2+))•c(S^(2-))•c(H_2S))=(c^2(H^+)•c(S^(2-...
Compound states [like (s) (aq) or (g)] are not required. You can use parenthesis () or brackets []. How To Balance Equations Balance any equation or reaction using this chemical equation balancer! Find out what type of reaction occured. Read our article on how to balance che...
ReactantsProducts Fe22✔️ O1212✔️ H66✔️ S33✔️ Since there is an equal number of each element in the reactants and products of Fe2O3 + 3H2SO3 = Fe2(SO4)3 + 6H, the equation is balanced. Fe2O3-++H2SO3-+ ...
Ⅱ、如果以MgSO4(s)和FeCl3(s)为原料制备9.0g MgO?2Fe2O3,在制取过程中至少需要1mol/L的NaOH(aq) 350 mL.Ⅲ、在一次制备Fe3O4的实验中,由于反应物比例控制不当,获得了另一种产品.取a克该产品溶于100mL盐酸(足量)中,需要通入672mL(标准状况)Cl2才能把溶液中的Fe2+全部氧化为Fe3+,然后蒸干所得溶液...