chapter 11 chemical reactions test
a catalyst is
not used up in the reaction
when H₂SO₄ and NaOH react by a double replacement
Na₂SO₄ is produced
among the elements which one could replace all of the rest as an ion from a compound in an aqueous solution a) cu b) ca c) fe d) ag
b) Ca
based on the activity series the reaction most likely to occur from among the following is a) Cu + HCl → b) Zn + HNO₃ → c) Pb + Na₂SO₄ → d) Ag + Cu(NO₃)₂ →
b) Zn + HNO₃ →
when the equation Mg + HCl → MgCl₂ + H₂ is balanced what is the coefficient for HCl
2
when the following equation is balanced the coefficient in front of HCl is Ba + HCl → BaCl₂+ H₂
2
when the reaction Fe + O₂ → Fe₂O₃ is balanced, what is the coefficient for Fe₂O₃
2
___AgNO₃ + H₂S → Ag₂S + ___HNO₃
2, 2
___ Fe(NO₃)₃ + ___ Na₂CO₃ → Fe₂(CO₃)₃ + ___NaNO₃
2, 3, 6
___Ca + ___H₃PO₄ → Ca₃(PO₄)₂ + ___H₂
3, 2, 3
___NO₂ + O₂ → ___N₂O₅
4, 2
if butane (C₄H₁₀) undergoes complete combustion
8 CO₂ is one product
in order for the reaction 2Al + 6HCl → 2AlCl₃ + 3H₂ to occur what has to be true
Al must be above H on the activity series
in order for the reaction Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag to occur, what must be true
Cu must be above Ag in the activity series
what binary compound decomposes to form K + I₂
KI
the spectator ions in the reaction ZnCl₂ + 2LiOH → 2LiCl + Zn(OH)₂ are
Li⁺ and Cl⁻
a double placement reaction takes place when aqueous K2SO4 reacts with aqueous PB(NO3)2 you would expect one of the products of this reaction to be
PbSO4
double replacement reactions are generally driven by the formation of
a precipitate
which of the following is incorrect a) complete combustion has occured when all the carbon in the product is in the form of carbon dioxide b) a single reactant is the identifying of characteristic of a decomposition reaction c) the only way to determine the products of a reaction is to perform the reaction d) all of the above
c) the only way to determine the products of a reaction is to perform the reaction
in the chemical equation 2H₂O₂ (MnO₂)→ 2H₂O + O₂ (MnO₂) is a
catalyst
the reaction Fe + O₂ → Fe₂O₃ is an example of what kind of reaction
combination reaction
the equation 2C₃H₇OH +9O₂ → 6CO₂ + 8H₂O is an example of what type of reaction
combustion
water is often a product in
combustion reactions
the equation H₃PO₄ + KOH → K₃PO₄ + 3H₂O is an example of what kind of reaction
double replacement
the symbol ∆ in a chemical reaction means
heat is applied to the reaction
in a double placement reaction
positive ions are exchanged between ionic compounds
the complete combustion of octane (C₈H₁₈) would
require 25 O₂ produce 16 CO₂ produce 18 H₂O
the equation HCl is Ba + HCl → BaCl₂+ H₂ is an example of what type of reaction
single replacement
Mg + HCl → MgCl₂ + H₂ is an example of what type of reaction
single-replacement reaction
a chemical formula written above or below the yield sign indicates
that the substance is a catalyst