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能正确表示下列各组溶液混合后,所得液体恰好呈中性的离子方程式是( )
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常温下下列有关电解质溶液的叙述正确的是
等浓度等体积的强酸与强碱溶液混合后,溶液的pH=7
pH=2的盐酸与pH=12的氨水等体积混合后所得溶液显中性
pH=10的Ba(OH)
2
溶液和pH=13的NaOH溶液等体积混合后溶液的pH=10.7(lg 2=0.3)
将10 mL pH=a的盐酸与100 mL pH=b的Ba(OH)
2
溶液混合后恰好中和,则a+b=13
室温下一元酸HA溶液与一元碱BOH溶液等体积混合下列有关判断正确的是
若混合后所得溶液呈中性,则HA肯定是强酸、BOH肯定是强碱
若混合前酸、碱物质的量浓度相同,混合后所得溶液呈酸性,则HA肯定是弱酸
若混合前酸、碱pH之和等于14,混合后所得溶液呈碱性,则BOH肯定是弱碱
若混合后所得溶液呈酸性,则混合溶液中离子浓度一定满足:
能正确表示下列各组溶液混合后所得液体恰好呈中性的离子方程式是①BaOH2和NaHSO4Ba2++2O
③④
②④
①③
①④
某温度时水的离子积常数KW=10-13将此温度下pH=11的BaOH2溶液aL.与pH=1的H2SO
1将等体积等物质的量浓度的醋酸和氢氧化钠溶液混合后溶液呈填酸性中性或碱性下同溶液中cNa+cCH3C
31将等体积等物质的量浓度的醋酸和氢氧化钠溶液混合后溶液呈填酸性碱性中性溶液中cNa+cCH3COO
向27.2Cu和Cu2O的混合物中加入某浓度的稀HNO3500mL固体完全溶解后在所得溶液中加入1m
常见的酸盐酸硫酸硝酸和常见的碱氢氧化钠氢氧化钾完全反应时所得的溶液呈中性已知固体A.是一种纯净物B.
已知T.℃K.W.=1×10-13在T.℃时将pH=11的NaOH溶液aL.与pH=1的H2SO4溶
25℃已知pH=2的高碘酸溶液与pH=12的NaOH溶液等体积混合所得混合液显酸性pH=2的高锰酸溶
某温度时水的离子积是Kw=1×10-13则该温度25℃填大于小于或等于其理由是若将此温度下pH=11
已知pH=2的高碘酸H5lO6溶液与pH=12的NaOH溶液等体积混合所得溶液呈酸性0.01m
某温度时水的离子积常数K.W.=10-13将此温度下pH=11的BaOH2溶液aL.与pH=1的H2
若所得混合溶液为中性,则a∶b=1∶1
若所得混合溶液为中性,则生成沉淀的物质的量为0.05b mol
若a∶b=9∶2,则所得溶液pH等于2
若a∶b=9∶2,则该混合溶液最多能溶解铁粉0.28(a+b)g
向27.2gCu和Cu2O的混合物中加入某浓度的稀HNO3500mL固体完全溶解后在所得溶液中加入1
已知水在25℃和95℃时其电离平衡曲线如图所示125℃时将pH=9的NaOH溶液与pH=4的H2SO
常温下pH=3的醋酸溶液和pH=13的氢氧化钠溶液等体积混合后恰好完全反应不考虑混合后溶液体积的变化
反应后的溶液呈中性
醋酸和氢氧化钠溶液混合前溶质物质的量浓度相同
反应后溶液中:C.(H.
+
)・C(OH
-
)=10
-14
反应后溶液中存在平衡:CH
3
COO
-
+H
2
O
CH
3
COOH+OH
-
某温度t℃时水的离子积为K.W.=1×10-13则该温度____25℃选填><=其理由是______
1将等体积等物质的量浓度的醋酸和氢氧化钠溶液混合后溶液呈填酸性中性或碱性下同溶液中cNa+cCH3C
Ⅰ将pH=13的BaOH2溶液与pH=3的稀盐酸混合并保持25℃的恒温使混合后pH=11混合后溶液体
某温度下水的离子常数KW=10—13将此温度下pH=11的BaOH2溶液aL与pH=1的H2SO4溶
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