canxi cacbonat ± axit clohidic ⇒ canxi cloua ± khi cacbonnic ± nuoc
a,viet pthh
b,tinh khoi liong cua canxi cloua thu dc khi cho 10 g canxi clohidic du
c, tinh the tich khi cacbonic thu dc o phong khi lam thi Nghiem , neu co 5g canxi cacbonat tac dung het voi axit.
canxi cacbonat ± axit clohidic ⇒ canxi cloua ± khi cacbonnic ± nuoc a,viet pthh b,tinh khoi liong cua canxi cloua thu dc khi cho 10 g canxi clohi
By Ariana
a, CaCO3+ 2HCl -> CaCl2+ CO2+ H2O
b, (mình hiểu là 10g canxi cacbonat nha)
nCaCO3= $\frac{10}{100}$= 0,1 mol= nCaCl2
=> mCaCl2= 0,1.111= 11,1g
c,
nCaCO3= $\frac{5}{100}$= 0,05 mol= nCO2
=> V CO2= 0,05.22,4= 1,12l
$a)$
PTHH: CaCO3 + 2HCl $→$ H2O + CO2 + CaCl2
$b)$
CaCO3: canxi cacbonat
HCl: axit clohidric
$c)$ $n_{CaCO_3}=$ $\dfrac{5}{100}=0,05(mol)$
Theo PTHH $→$ $n_{CaCO_3}=n_{CO_2}=0,05(mol)$
$→$ $V_{CO_2}$ đktc $=0,05 \times 22,4 = 1,12(l)$