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第9頁

信息發(fā)布者：
?$ {\mathrm {Na}_2\mathrm {CO}_3}$?
$? \ \text {Fe}_2\ \text {O}_3+3\ \text {H}_2\ \text {SO}_4\xlongequal[\ \ \ \ \ \ ]{}\ \text {Fe}_2(\ \text {SO}_4)_3+3\ \text {H}_2\ \text {O}?$
?$ \mathrm {Al}(\mathrm {OH)}_3+3 \mathrm {HCl}\xlongequal[ ]{}$?
?$ \mathrm {AlCl}_3+3 \mathrm {H}_2 \mathrm {O}$?
$? \ \text {SO}_2+2\ \text {NaOH}\xlongequal[\ \ \ \ \ \ ]{}\ \text {Na}_2\ \text {SO}_3+\ \text {H}_2\ \text {O}?$
NaOH溶液
C
BC
鹽酸
=
?$ \mathrm {NaOH}+\mathrm {HCl}\xlongequal[ ]{} \mathrm {NaCl}+\mathrm {H}_2 \mathrm {O}$?
?$ \mathrm{ Na_2CO_3} $?
做補(bǔ)鈣劑
?$\mathrm {Ca}(\mathrm {OH)}_2+\mathrm {CO}_2\xlongequal[   ]{    }\mathrm {CaCO}_3↓+\mathrm {H}_2\mathrm {O}$?
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