Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) CaCO3------> CaO+ CO2
CaO+ H2O------>Ca(OH)2
Ca(OH)2+ CO2------> CaCO3+ H2O
b) Ca(OH)2+ FeSO4-----> Fe(OH)2↓+ CaSO4↓
2Fe(OH)2+ 1/2O2+ H2O-----> 2Fe(OH)3
2Fe(OH)3----to--> Fe2O3+ 3H2O
Fe2O3+ 2Al-----to----> 2Fe+ Al2O3
c) Ca(OH)2+ 2CO2----> Ca(HCO3)2
Ca(HCO3)2----to-->CaCO3+ CO2+ H2O
hoàn thành các pthh sau:
Ca(OH)2 ->Ca(HCO3)2
Ca(OH)2 -> Ca(NO3)2
CaCl2 -> Ca(NO3)2
Ca(HCO3)2 ->CaCl2
Ca(OH)2+ CO2--->Ca(HCO3)2
Ca(OH)2+ Mg(NO3)2----->Ca(NO3)2+Mg(OH)2
CaCl2+ 2AgNO3--->2AgCl+Ca(NO3)2
Ca(HCO3)2+ 2HCl---->CaCl2+2CO2+2H2O
Chúc bạn học tốt :))
Đáp án: A
Xét tỉ lệ: \(\dfrac{n_{CO_2}}{n_{Ca\left(OH\right)_2}}=\dfrac{1}{1}=1\)
→ Muối tạo thành là CaCO3.
Bạn tham khảo nhé!
\(\text{2Na+2H2O}\rightarrow\text{2NaOH+H2↑}\)
\(\text{2NaOH(đậm đặc)+CO2}\rightarrow\text{Na2CO3+H2O}\)
\(\left\{{}\begin{matrix}\text{CO2+NaOH}\rightarrow\text{NaHCO3}\\\text{H2CO3+NaOH}\rightarrow\text{NaHCO3+H2O}\end{matrix}\right.\)
\(\text{Na2CO3+Ca(OH)2}\rightarrow\text{CaCO3↓+2NaOH}\)
\(\text{CaCO3 + 2HCl → H2O + CO2 + CaCl2}\)
\(\text{CaCl2+Na2CO3}\rightarrow\text{CaCO3↓+2NaCl}\)
\(\text{CaCO3(thể rắn)+CO2+H2O}\rightarrow\text{Ca(HCO3)2(dung dịch pha loãng)}\)
\(\text{Ca(HCO3)2 → CaCO3 + H2O + CO2}\)
\(\text{Ca(HCO3)2 + 2HCl → 2H2O + 2CO2 + CaCl2}\)
\(\text{2Li3PO4+3CaCl2(đậm đặc)}\rightarrow\text{6LiCl↓+Ca3(PO4)2↓}\)
\(\text{NaHCO3+HCl}\rightarrow\text{NaCl+CO2↑+H2O}\)
\(\text{2NaCl+2H2O}\rightarrow\text{H2↑+2NaOH+Cl2↑}\)
1
a)
2Ca + O2 → 2CaO
CaO + H2O →Ca(OH)2
Ca(OH)2 + CO2 → CaCO3 + H2O
CaCO3 + CO2 + H2O → Ca(HCO3)2
Ca(HCO3)2->CaCO3+H2O+CO2
CaCO3-to>CaO+CO2
b) 2NaCl+2H2O->2NaOH+Cl2+H2
2NaOH+H2SO4->Na2SO4+H2O
Na2SO4+BaCL2->BaSO4+2NaCl
NaCl+AgNO3->AgCl+NaNO3
CaCo3-> CaO+CO2
CaO + H2O->Ca(OH)2
Ca(OH)2 + CO2 -> CaCO3 + H2O
CaCO3 + 2HCl ->CaCl2 + H2O+ CO2
CaCl2 + Na2CO3 -> CaCO3 + 2NaCl
CaCO3 \(\underrightarrow{t^o}\) CaO + CO2
CaO + H2O \(\rightarrow\) Ca(OH)2
Ca(OH)2 + CO2 \(\rightarrow\) CaCO3 + H2O
CaCO3 + 2HCl \(\rightarrow\) CaCl2 + H2O + CO2
CaCl2 + Na2CO3 \(\rightarrow\) CaCO3 + 2NaCl
\(Ca+H_2O\rightarrow Ca\left(OH\right)_2\)
\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
\(CaCO_3\rightarrow CaO+CO_2\)
\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
\(Ca\left(OH\right)_2+CO_2\rightarrow Ca\left(HCO_3\right)_2\)
\(Ca\left(HCO_3\right)_2+HCl\rightarrow H_2O+CO_2+CaCl_2\)
(1) Ca + 2H2O ---> Ca(OH)2 + 2H2.
(2) Ca(OH)2 + CO2 ---> CaCO3↓ + H2O
(3) CaCO3 ---to---> CaO + CO2.
(4) CaO + H2O ---> Ca(OH)2.
(5) Ca(OH)2 + 2CO2 ---> Ca(HCO3)2.
(6) Ca(HCO3)2 + 2HCl ---> 2H2O + 2CO2↑ + CaCl2.