HBr(aq) + Na_2S(aq) rightarrow HCIO_4 (aq) + CO_3 (aq) Complete and balance each
ID: 489670 • Letter: H
Question
HBr(aq) + Na_2S(aq) rightarrow HCIO_4 (aq) + CO_3 (aq) Complete and balance each gas-evolution equation: HNO_3(aq) + Na_2SO_3 (aq) rightarrow HCl(aq) + KHCO_3 (aq) rightarrow HC_2H_3O_2(aq) + NaHSO_3(aq) rightarrow (NH_4)_2 SO_4 (aq) + Ca(OH)_2 (aq) rightarrow Oxidation-Reduction and Combustion Assign oxidation states to each atom in each element, ion, or compound. Ag Ag^+ CaF_2 H_2S CO_3^2- CrO_4^2- Assign oxidation states to each atom in each element, ion, or compound. CI_2 Fe^3+ CuCI_2 CH_4 Cr_2O_7^2- HSO_4 What is the oxidation state of CI in each compound? CrO CrO_3 Cr_2O_3 What is the oxidation state of Cl in each ion? CIO^- CIO_4^- CIO_3^- CIO_4^- Determine whether each reaction is a redox reaction. For each redox reaction, identify the oxidizing agent and the reducing agent. The density of a 20.0% by mass ethylene glycol (C_2H_6O_2) solution in water is 1.03 g/mL. Find the molarity of the solution. Find the percent by mass of sodium chloride in a 1.35 M NaCIExplanation / Answer
89) O takes -2 charge in general
CrO has Cr in +2 state
CrO3 has Cr i +6 state
Cr2O3 has Cr in +3 state ,
for Cr2O3 2Cr ( oxidation state) + 3 O ( oxidation state) = 0
2 Cr ( oxidation state) + 3( -2) =0 , hence Cr ( oxidation state) = +3
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