a reaction occurs and a precipitate ( ppt ) forms, write the balanced molecular
ID: 572278 • Letter: A
Question
a reaction occurs and a precipitate (ppt) forms, write the balanced molecular equation for the reaction. Indicate the formation of a precipitate by using the appropriate state of matter in the equation.
a reaction occurs and a gas is produced in the reaction, write the balanced molecular equation for the reaction. Indicate the formation of a gas by using the appropriate state of matter in the equation. Write “bubbles” in the appropriate box in the table.
a reaction occurs (for example an acid-base reaction) but no solid precipitate forms, write the balanced molecular equation for the reaction. Write NP in the appropriate box in the table. (See #1.)
no reaction occurs, write NR in the appropriate box in the table.
Reagents
Unknowns
pH
KOH
AgNO3
BaCl2
NaCl
NH3(aq)
Na2S
Na2SO4
H2SO4
HCl
HNO3
H2SO4
KOH
NH3**
Na2S
NaCl
CuCl2
a
BaCl2
n*
AgNO3
n*
Cu(NO3)2
a
Fe(NO3)3
NaI
n*
Na2SO4
n*
Na2CO3
a reaction occurs and a precipitate (ppt) forms, write the balanced molecular equation for the reaction. Indicate the formation of a precipitate by using the appropriate state of matter in the equation.
a reaction occurs and a gas is produced in the reaction, write the balanced molecular equation for the reaction. Indicate the formation of a gas by using the appropriate state of matter in the equation. Write “bubbles” in the appropriate box in the table.
a reaction occurs (for example an acid-base reaction) but no solid precipitate forms, write the balanced molecular equation for the reaction. Write NP in the appropriate box in the table. (See #1.)
no reaction occurs, write NR in the appropriate box in the table.
Reagents
Unknowns
pH
KOH
AgNO3
BaCl2
NaCl
NH3(aq)
Na2S
Na2SO4
H2SO4
HCl
HNO3
H2SO4
KOH
NH3**
Na2S
NaCl
CuCl2
a
BaCl2
n*
AgNO3
n*
Cu(NO3)2
a
Fe(NO3)3
NaI
n*
Na2SO4
n*
Na2CO3
Explanation / Answer
1. HCl + KOH = KCl + H2O, no precipitation will occur
HCl + AgNO3 ==== AgCl (s) + HNO3 , white precipitate
HCl + BaCl2 === No reaction will occur
HCl + NaCl ==== No reaction will occur
HCl + NH3 === NH4Cl , no precipitation
HCl + Na2S === NaCl + H2S (g), bubbles
HCl + Na2SO4 ==== No reaction will occur
HCl + H2SO4 ====== No rection
A solution of HCl will be acidic
2. HNO3
HNO3 + KOH === KNO3 + H2O, no precipitation
HNO3 + AgNO3 ==== No reaction
HNO3 + BaCl2 === Ba(NO3)2 + 2 HCl , no precipitation
HNO3 + NH3 ==== NH4NO3, no ppt
HNO3 + Na2S === H2S + 2 NaNO3, bubbles
HNO3 + Na2SO4 ==== No reaction
HNO3 + H2SO4 === No reaction
a solution of HNO3 will be acidic
3
H2SO4 + 2 KOH = 2H2O + K2SO4 , no ppt
H2SO4 + 2AgNO3 === Ag2SO4 + 2HNO3, ppt white
H2SO4 + BaCl2 === 2HCl + BaSO4 (s), white ppt
H2SO4 + NaCl ==== Na2SO4 + HCl , no ppt
H2SO4 + NH3 ==== (NH4)2SO4, no ppt
H2SO4 + Na2S === Na2SO4 + H2S , bubbles
H2SO4 + Na2SO4 === no reaction
H2SO4 + H2SO4 === no reaction
a solution of this will be acidic
4. KOH + KOH = no reaction
AgNO3 + KOH == KNO3 + Ag(OH) (s) precipitate is formed
2 KOH + BaCl2 === Ba(OH)2 + 2 KCl, white precipitate is formed
KOH + NaCl === NaOH + KCl , no ppt
KOH + NH3 ==== No reaction
KOH + Na2S === No reaction
KOH + Na2SO4 === K2SO4 (aq) + NaOH (aq) no ppt
2 KOH + H2SO4 == K2SO4 +2 H2O, no ppt
A solution of this will be basic
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