\(6,Ca\left(OH\right)_2+2HBr\rightarrow CaBr_2+2H_2O\\ 7,Ca\left(OH\right)_2+2HCl\rightarrow CaCl_2+2H_2O\\ 8,Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\\ 9,Ca\left(OH\right)_2+Na_2CO_3\rightarrow CaCO_3+2NaOH\\ 10,Na_2S+H_2SO_4\rightarrow Na_2SO_4+H_2S\\ 11,Na_2S+2HCl\rightarrow2NaCl+H_2S\)
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\(1,2C_4H_{10}+13O_2\rightarrow8CO_2+10H_2O\\ 2,C_2H_2+2Br_2\rightarrow C_2H_2Br_4\\ 3,2C_6H_5OH+2Na\rightarrow2C_6H_5ONa+H_2\uparrow\\ 4,2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+H_2O+CO_2\uparrow\\ 5,CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\)
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