pH4208642M WP024681012MpoH某温度下,向\({\rm 20mL}\)一定浓度的\({\rm NaOH}\)溶液中滴加\({\rm 1mol\boldsymbol{⋅}L ^{-1}}\)甲酸\({\rm (HCOOH}\),弱酸\({\rm )}\)溶液,溶液的\({\rm pH}\)和\({\rm pOH}\)关系如图所示。下列说法正确的是\({\rm (\:\:\:\:)}\) A...
已知25℃时,0.1mol/L的碳酸氢钠溶液的pH为8.4,则关于该溶液的叙述错误的是( ) A、滴加甲基橙溶液呈黄色 B、c(HCO3-)>c(H2CO3)>c(CO32-) C、c(OH-)=c(H+)+c(H2CO3)-c(CO32-) D、加水稀释, c(H2CO3) c(HC O - 3 ) 的比值减小 ...
百度试题 题目根据,弱电解质的浓度越小,则电离度越大,因此对某一弱酸来说,其溶液越稀,[H + ]越大,pH越小。A.正确B.错误 相关知识点: 试题来源: 解析 B 反馈 收藏
Phấn hoa cỏ phấn hương Không có Không có Không có Gợi ý giúp kiểm soát tình trạng dị ứng của bạn Tắm rửa sau khi ở ngoài trờiĐể loại bỏ lượng phấn hoa bám vào người khi ...
下列情况下.溶液中可能大量存在的离子组是A.无色溶液中:H+.Na+.I-.ClO-B.使酚酞变红的溶液中:K+.Na+.SO32-.SO42-C.使pH试纸呈红色的溶液中:K+.Fe2+.NO3-.Cl-D.由水电离的c(H+)=10-12mol/L的溶液中:NH4+.Cl-.CO32-.Al3+
XZSY 0-18 型号:0-18 品牌:XZSY 系列:推力球轴承 内径:57.15mm 外径:84.931mm 宽度:22.225mm 更新日期:2025-04-05 数量: 加入采购清单 立即求购 相似型号 NACHI O-18 产品对照 商情分析 共1 张 第1 张 上一张 1 下一张 英制 重量 Mass 399 g - 主要尺寸 尺寸系列 其他 - d 57.15 ...
摘要: In 1680 Newton proposed an algorithm for finding roots of polynomials. His method has since evolved but the core concept remains intact. The convergence of Newton's Method has been widely ch...关键词:Convergence Newton method Trajectory Fractals Poles and zeros Limit-cycles Taylor series ...
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PURPOSE: To improve the operability by the operator by setting a write enable token to each of plural pages displayed on a display means with respect to the telewriting communication terminal equipment. ;CONSTITUTION: In the telewriting terminal equipment 1 provided with a display unit 11 able to...