Cho 10 gam CaCO3 tác dụng với HCl tạo ra CaCl2 , nước và khí cácbonic.Tìm khối lượng chất tham gia và sản phẩm

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Em tham khảo!

Đáp án:

 $+)$ Tham gia:

$m_{HCl}=7,3g$

$+)$ Sản phẩm:

$m_{CaCl_2}=11,1g$

$m_{H_2O}=1,8g$

$m_{CO_2}=4,4g$

Giải thích các bước giải:

 Ta có PTHH sau:

$CaCO_3+2HCl$ $\rightarrow$ $CaCl_2+H_2O+CO_2↑$

$+)$ Tham gia: $CaCO_3, HCl$

$+)$ Sản phẩm:$CaCl_2, H_2O,CO_2$

Có $n_{CaCO_3}$ $=$ $\dfrac{10}{100}$ $=0,1$ mol

Dựa vào PTHH) $n_{HCl}$ $=0,2$ mol

`@`Vậy $m_{HCl}$ $=0,2.36,5=7,3g$

Dựa vào PTHH) $n_{CaCl_2, H_2O, CO_2}$ $=0,1$ mol

`@`Vậy $m_{CaCl_2}$ $=0,1.111=11,1g$

`@`Vậy $m_{H_2O}$ $=0,1.18=1,8g$

`@`Vậy $m_{CO_2}$ $=0,1.44=4,4g$

Ta có: `n_(CaCO_3) = m/M = 10/100=0,1` (mol)

PTHH: `CaCO_3 + 2HCl -> CaCl_2 + H_2 O + CO_2`

Theo PTHH, ta có:

`n_(HCl) = 2n_(CaCO_3) = 2.0,1=0,2` (mol)

`n_(CaCl_2) = n_(H_2 O) = n_(CO_2) = n(CaCO_3) = 0,1` (mol)

`=> m_(HCl) = n.M = 0,2.36,5 = 7,3` (g)

`m_(CaCl_2) = n.M = 0,1.111 = 11,1` (g)

`m_(H_2 O) = n.M = 0,1.18 = 1,8` (g)

`m_(CO_2) = n.M = 0,1.44 = 4,4` (g)

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