For the reaction KCIO, KCI +0, 2 assign oxidation numbers to each element on each side of the equation. K in KCIO,: K in KCI: Cl in KCIO,: Cl in KCI: O in KCIO,: O in O,: Which element is oxidized? Which element is reduced? OK
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- 4-28 Answer true or false. (a) A net ionic equation shows only those ions that undergo chemical reaction. (b) In a net ionic equation, the number of moles of starting material must equal the number of moles of product. (c) A net ionic equation must be balanced by both mass and charge. (d) As a generalization, all lithium, sodium, and potassium salts are soluble in water. (e) As a generalization, all nitrate (NO3- salts are soluble in water. (f) As a generalization, most carbonate (CO3) salts are insoluble in water. (g) Sodium carbonate, Na2CO3, is insoluble in water. (h) Ammonium carbonate, (NH4 )2CO3, is insoluble in water. (j) Calcium carbonate, CaCO3, is insoluble in water. (j) Sodium dihydrogen phosphate, NaH2PO4, is insoluble in water. (k) Sodium hydroxide, NaOH, is soluble in water. (l) Barium hydroxide, Ba(OH)2, is soluble in water.Calculate the oxidation number of the underlined element. a) HClO4 b) CH4 c) PO4 3- Consider the photosynthesis reaction: CO2 + H2O → CH2O + O2 Change in O.N. for oxygen: ????1, Find the oxidation numbers of the elements in bold print. a) HClO d) PbSO4 g) Na2O2 b) KClO3 e) NaIO4 h) K2SO4 c) MnO2 f) ClO41- i) NH41+ 2, State whether the change is an oxidation or a reduction. a) MnO41– becomes MnO42– __________d) P4O6 becomes P4O10 ____________ b) N2 becomes NH3 ____________ e) NH3 becomes N2O ____________ c) O2- becomes O2 ____________ f) SO42– becomes S2O32– ____________
- 3. a) When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?Mg2+ + Mn2+ Mg + MnO4- Water appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (Enter 0 for neither.)How many electrons are transferred in this reaction? b) When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?Cl2 + Zn2+HClO + ZnWater appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (Enter 0 for neither.)How many electrons are transferred in this reaction? c) When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?Zn + HNO3 Zn2+ + NO Water appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (Enter 0 for neither.)How many electrons are transferred in…2CrO42- + 3Pb+ 5H2O2Cr(OH)3 + 3HPbO2-+ OH- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.When the following equation is balanced properly under basic conditions, what are the coefficients of the species shown?Cl- + NiO2 Ni(OH)2 + Cl2 Water appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (Enter 0 for neither.)Which element is oxidized?
- a. What is the molarity of a solution of KMnO4 if 40.00 ml will oxidize 0.3 g Na2C2O4 (134 g/mol)? b. What is the value of 1.00 ml of the above solution in terms of FeSO4.7H2O ( 278 g/mol) c. What is the value of 1.00 ml of the above permanganate solution in terms of grams As2O3 (198 g/mol)Combustion reactions (burning of fuels) are another example of redox. Coal is nearly pure carbon and has been burned as a fuel for centuries. The reaction of coal with oxygen in the air is illustrated by the balanced equation: C + O2 → CO2 What is the change in oxidation state for the carbon in this reaction? Group of answer choices +2 -4 +4How to write net iconic reaction of Al2(SO4)3(NH4)SO4•24H2O + BaCl --> ?
- When the following skeletal equation is balanced under acidic conditions, what are the coefficients of the species shown?Pb + Cr2O72- ---->Pb2+ + Cr3+Water appears in the balanced equation as a ____ (reactant, product, neither) with a coefficient of ____(Enter 0 for neither.) Which species is the oxidizing agent?13. Balance the following reaction under basic conditions. What are the coefficients in front of H2O and Cl- in the balanced reaction? Cl2(aq) + Br2(l) → BrO3-(aq) + Cl-(aq) Group of answer choices A) H2O = 2, Cl- = 2 B) H2O = 2, Cl- = 5 C) H2O = 6, Cl- = 10 D) H2O = 4, Cl- = 6 E) H2O = 7, Cl- = 3When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?________Ag+ +_______ Mg------->_____Ag + ____Mg2+Water appears in the balanced equation as a _______ (reactant, product, neither) with a coefficient of__________ . (Enter 0 for neither.)Which element is oxidized? ___________