水鹽體系相平衡測定及硫酸鉀制備

1、K2SO4制備實(shí)驗(yàn)數(shù)據(jù)記錄： 第一次反應(yīng)從10:40-12:40配料組成為相圖的“1”點(diǎn)處，加入物料，Na2SO4:28.4g K2Cl2:21.6g H2O:50.8g，反應(yīng)兩個(gè)小時(shí)后進(jìn)行真空過濾：M濾液=120.1-55.1=65.0g M固=93.8-60.8=33.0g對復(fù)鹽和濾液進(jìn)行分析：、鉀離子：固體試樣得到四硼酸鉀的質(zhì)量ms'=249539-24.8761=0.0778g所取固體試樣的質(zhì)量ms=28.4718-24.4623=4.0095g所取液體試樣的質(zhì)量ml=21.3578-16.4786=4.8792g液體試樣所得四苯硼酸鉀的質(zhì)量ml'=24.3004-24

2、.2825=0.0179g固相中鉀含量K+%=0.0778x0.10911.0095x5/500x100=21.17%溶液中鉀含量K+%=0.0179x0.10914.8792x5/250x100=2.00%、氯離子固體試樣質(zhì)量：17.9359-16.9882=0.9657g 液體試樣質(zhì)量：21.8897-16.9825=4.9072g標(biāo)定固體試液消耗AgNO3體積：1.21ml 標(biāo)定液體消耗體積:4.40ml固體中氯離子含量Cl-%=1.21x0.05x0.3546x1000.9657x10/250=5.55%液體中氯離子含量:Cl-%=4.40x0.05x0.03546x1004.9072

3、x100/500=7.95%、硫酸根離子固體試樣質(zhì)量：17.9539-16.9882=0.9657g液體試樣質(zhì)量：21.8897-16.9825=4.9072g標(biāo)定固體試液消耗BaCl2體積：32.15-28.65=3.50ml標(biāo)定液體試液消耗BaCl2體積：28.62-25.52=3.13ml固體中硫酸鈉含量:Na2SO4%=3.50x0.1x0.071031.1682x10/250x100=53.20%液體中硫酸鈉含量:Na2SO4%=3.13x0.1x0.071038.4768x10/500x100=6.56% 第二次反應(yīng)從13:50-15:50所取物料用量 復(fù)鹽:20.9g K2Cl2

4、:15.9g H2O:40.4g,反應(yīng)兩個(gè)小時(shí)后，過濾，m濾液=52.9g mK2SO4=21.5g分析濾液和產(chǎn)品中離子含量：、鉀離子固體試樣：樣品質(zhì)量：4.3927g 液體試樣：樣品質(zhì)量：4.5884g沉淀質(zhì)量24.4112-24.2825=0.1287g沉淀質(zhì)量24.9893-24.9151=0.0742gK+%(液)=0.1287x0.10914.0327x5/500x100=31.96%K+%(液)=0.0742x0.10914.5884x5/250x100=4.41%、氯離子固體試樣質(zhì)量:1.1404g 液體試樣質(zhì)量:53.671g滴定固體消耗量:45.52-41.25=1.27ml

5、滴定液體消耗量:33.70-25.75=7.95mlCl-%(固)=1.27x0.05x0.03546x1001.1404x10/250=4.94%Cl %(液)=7.95x0.05x0.03546x1005.3671x10/500=13.13%、硫酸鈉固體樣品質(zhì)量26.6459-25.0658=1.5801g液體樣品質(zhì)量25.2814-13.9834=8.2980g滴定固體消耗量:39.95-33.50=6.45ml滴定液體消耗量:7.15-5.72=1.43mlNa2SO4%(固)=6.45x0.1x0.071031.58x10/250x100=72.49%Na2SO4%(液)=1.43x0.1x0.071038.2980x10/250x100=3.06%第一次反應(yīng)