The reaction equation is H₂ + Cl₂ = 2HCl. What is the valence of chlorine in HCl? A. +1 B. -1 C. D. +2 相关知识点: 试题来源: 解析 B。在 HCl 中,氢元素通常显+1 价,根据化合物中正负化合价代数和为零,可算出氯元素显-1 价。
ReactionNamesReactionsTemperature (°C)ΔHkJ/mol H2ReactionNamesReactionsTemperature (°C)ΔHkJ/mol H2 Five-Step 1 Hydrolysis 2CuCl2(s) + H2O(g) → CuO∗CuCl2(s) + 2HCl(g) 400 120.2 Hydrolysis 2CuCl2(s) + H2O(g) → CuO(s) + CuCl2(s) + 2HCl(g) 400 2 ThermolysisO2 productio...
a HCl + b Mg = c ClMgCl + d HH Step 2: Create a System of Equations Create an equation for each element (H, Cl, Mg) where each term represents the number of atoms of the element in each reactant or product. H: 1a + 0b = 0c + 2d Cl: 1a + 0b = 2c + 0d Mg: 0a ...
{eq}H_2 + Cl_2 \rightarrow 2HCl {/eq} Enthalpy of Reaction: The enthalpy of a reaction can be used to determine whether the chemical reaction leads to the production of heat or whether heat is required to form the products. Using...
a Hg + b HCl = c Hg2Cl2 + d H2 Step 2: Create a System of Equations Create an equation for each element (Hg, H, Cl) where each term represents the number of atoms of the element in each reactant or product. Hg: 1a + 0b = 2c + 0d H: 0a + 1b = 0c + 2d Cl: 0a...
a NH4Cl + b HCl = c NH2Cl + d H2Cl Step 2: Create a System of Equations Create an equation for each element (N, H, Cl) where each term represents the number of atoms of the element in each reactant or product. N: 1a + 0b = 1c + 0d H: 4a + 1b = 2c + 2d Cl: 1a...
a CH3Cl + b HNO3 = c C2H5NO3 + d HCl Step 2: Create a System of Equations Create an equation for each element (C, H, Cl, N, O) where each term represents the number of atoms of the element in each reactant or product. C: 1a + 0b = 2c + 0d H: 3a + 1b = 5c +...
a SO3 + b HCl = c H2SO3 + d Cl Step 2: Create a System of Equations Create an equation for each element (S, O, H, Cl) where each term represents the number of atoms of the element in each reactant or product. S: 1a + 0b = 1c + 0d O: 3a + 0b = 3c + 0d H: 0...
Fe2(SO4)3+2HCl + SnCl2=2FeSO4+ H2SO4+ SnCl4 ReactantsProducts Fe22✔️ S33✔️ O1212✔️ H22✔️ Cl44✔️ Sn11✔️ Step 3: Verify that the equation is balanced Since there are an equal number of atoms of each element on both sides...
a Br2 + b NH4Cl = c Br(NH4)2 + d Cl Step 2: Create a System of Equations Create an equation for each element (Br, N, H, Cl) where each term represents the number of atoms of the element in each reactant or product. Br: 2a + 0b = 1c + 0d N: 0a + 1b = 2c + ...