Chemistry, 31.01.2020 17:47 genyjoannerubiera

Sodium metal reacts with water to produce hydrogen gas.

what best describes this reaction?

a•a single replacement reaction takes place because sodium is less reactive than hydroxide ions.
b•a double replacement reaction takes place because sodium is less reactive than hydroxide ions.
c•a double replacement reaction takes place because sodium is more reactive than hydrogen.
d•a single replacement reaction takes place because sodium is more reactive than hydrogen.
question 2(multiple choice worth 4 points)

(04.03 mc)

the table shows the nature of reactants and products formed in a certain type of chemical reaction.

nature of reactants and products
reactants products
metal + ionic compound metal + ionic compound

which of the following is true about the type of chemical reaction?
a•it is a single replacement reaction, and the anions in the two ionic compounds are different.
b•it is a single replacement reaction, and the cations in the two ionic compounds are different.
c•it is a double replacement reaction, and the anions in the two ionic compounds are different.
d•it is a double replacement reaction, and the cations in the two ionic compounds are different.
question 3(multiple choice worth 4 points)

(04.03 lc)

which of the following is a single replacement reaction?

a• ba(oh)2 + h2so4 → baso4 + 2h2o
b• 2mg + o2 → 2mgo
c• h2o+ co2 → h2co3
d• zn + h2so4 → znso4 + h2
question 4 (true/false worth 2 points)

(04.03 lc)

when cacl2 and zn react together, zinc (zn) can replace chlorine (cl) in the compound because zinc is higher on the periodic table.

true
false
question 5 (true/false worth 2 points)

(04.03 lc)

a double replacement reaction is a reaction in which one element replaces a similar element within a compound.

true
false
question 6(multiple choice worth 4 points)

(04.03 mc)

which of the following equations has the correct products and is balanced correctly for a reaction between na3po4 and koh?

a• na3po4 + 3koh → 3naoh + k3po4, because k retains the same charge throughout the reaction
b• na3po4 + koh → na3oh + kpo4, because k increases in charge from 1+ to 3+ when it is replaced
c• na3po4 + koh → 3naoh + k3po4, because k retains the same charge throughout the reaction
d• na3po4 + koh → na3oh + k3po4, because k increases in charge from 1+ to 3+ when it is replaced

Answers: 3

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