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Moles Again...
astarmathsandphysics:
NaHCO3 has molar mass 23+1+12+3*16=84
Ghost Of Highbury:
--- Quote from: astarmathsandphysics on September 10, 2009, 03:41:03 pm ---NaHCO3 has molar mass 23+1+12+3*16=84
--- End quote ---
sir the equation hs 2NaHCO3
~~~~shreyapril~~~~:
This is my original solution hpe u understand it.
i think u may
find it in attachment
Ghost Of Highbury:
--- Quote from: shreyapril on September 10, 2009, 03:46:00 pm ---This is my original solution hpe u understand it.
i think u may
find it in attachment
--- End quote ---
OKK..FIRST OF ALL
I DIDNT GET Y U APPLIED RATIO PROPORTION WITH 168:9.3::18:x
y 18?
they have talked abt CO2 not H2O
ok..heres the sol.--------------------------
take only NAHCO3 and CO2 into consideration
168g NAHCO3 - 44g CO2 (by molar masseS)
this means that pure NAHCO3 168g will give out 44g of CO2
however here..2.24g of CO2 is given out ..
by ratio and proportion find out how much grams of NAHCO3 should be used to give out 2.24g of CO2
44g - 168g
2.24 - 8.55g
but...here 9.3g of NAHCO3 impure is used
this means that there is 9.3 - 8.55g of impurity = 0.75g of impurity
they've asked to calculate % purity
so what v do is
=> 8.55/9.3 * 100 = 92%
Ghost Of Highbury:
--- Quote from: eddie_adi619 on September 10, 2009, 03:58:12 pm ---
--- Quote from: shreyapril on September 10, 2009, 03:46:00 pm ---This is my original solution hpe u understand it.
i think u may
find it in attachment
--- End quote ---
OKK..FIRST OF ALL
I DIDNT GET Y U APPLIED RATIO PROPORTION WITH 168:9.3::18:x
y 18?
they have talked abt CO2 not H2O
ok..heres the sol.--------------------------
take only NAHCO3 and CO2 into consideration
168g NAHCO3 - 44g CO2 (by molar masseS)
this means that pure NAHCO3 168g will give out 44g of CO2
however here..2.24g of CO2 is given out ..
by ratio and proportion find out how much grams of NAHCO3 should be used to give out 2.24g of CO2
44g - 168g
2.24 - 8.55g
but...here 9.3g of NAHCO3 impure is used
this means that there is 9.3 - 8.55g of impurity = 0.75g of impurity
they've asked to calculate % purity
so what v do is
=> 8.55/9.3 * 100 = 92%
--- End quote ---
what do u think slvri and nid404?
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