Ca(H2PO4)2Na2HPO4TotalCaHPO4NaH2PO4Total Ca1111✔️ H415123❌ P213112❌ O8412448❌ Na2211❌ Step 2: Multiply coefficients for compounds to balance out each element For each element that is not equal, try to balance it by adding more of it to the side with less...
___P + ___FeO + ___CaO =___Ca3(PO4)2+___Fe (2) 制造光导纤维的材料是___;三硅酸镁(Mg2Si3O8·11H2O)用氧化物表示___。 (3) 除去NaHCO3溶液中少量的Na2CO3杂质相应的离子方程式为___。 (4) 检验SO42-所需要用的试剂___和___。 点击展开完整题目 查看答案和解析>> (10分) 按要求...
A.pH=6.8时,n(NaOH)=1/2n(NaH2PO4),NaOH完全反应但NaH2PO4有一半反应生成Na2HPO4,溶液中溶质为等物质的量浓度的NaH2PO4、Na2HPO4,H2PO4-、HPO42-电离和水解程度都较小,则溶液中c(H2PO4-)≈c(HPO42-),Ka2(H3PO4)=(c(HP(O_4)^(2-))•c(H^+))/(c(H_2P(O_4)^-))=c(H+)=10-6.8,故...
Na3PO4·12H2O + 2H3PO4 = 3NaH2PO4 + 12H2O. Enter the amount of any of the substances to determine the ideal amounts to maximize the theoretical yield of the reaction. To find the limiting and excess reagents when a non-ideal amount of each substance is used, you...
比较以下各对溶液的pH大小。 (1) 同浓度的NaH2PO4(a)和NH4H2PO4(b): (a)__(b) (2) 同浓度的Na2HPO4(c)和(NH4)2HPO4(d): (c)__(d) [已知pKb(NH3) = 4.74,H3PO4的pKa1~pKa3分别是 2.16,7.20,12.36]的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大
氫H4.0318 g/mol42.7024% 磷P30.9738 g/mol120.761% 氧O91.1966 g/mol5.761.127% NaH2PO4.7H2O 元素 质量百分比氧91.1966g氧91.1966g磷30.9738g磷30.9738g鈉22.9898g鈉22.9898g氫4.0318g氫4.0318gNaH2PO4.7H2O 原子#氧5.7氧5.7氫4氫4鈉1鈉1磷1磷1 ...
Step 2: Create a System of Equations Create an equation for each element (Na, H, P, O, Cl) where each term represents the number of atoms of the element in each reactant or product. Na:2a +0b=1c +0d+1fH:15a +1b =2c +2d +0fP:1a +0b=1c +0d+0fO:...
Balance NaOH + H3PO4 = NaH2PO4 + H2O Using the Algebraic Method Step 1: Label Each Compound With a Variable Label each compound (reactant or product) in the equation with a variable to represent the unknown coefficients. a NaOH + b H3PO4 = c NaH2PO4 + d H2O Step 2: Create a ...