NaOH标准溶液的标定

NaOH溶液的标定 建德市工业技术学校技能节竞赛试卷 化学分析工技能竞赛试卷 学号:______ 班级:__________ 姓名: HCL标准溶液的配制和标定 一、考核知识 用基准KHCHO标定NaOH溶液，反应式为 844 COOHCOONa +NaOH+HO2COOKCOOK 反应生成物为NaKHCHO,化学计量点时溶液呈碱性，可选用酚酞作指示剂 844 一、仪器与试剂 1、玻璃仪器: 仪器名称 酸碱两用滴定管 锥形瓶 移液管 烧杯 洗瓶 100m 规格 25mL 250mL 25mL 500mL L 数量 1支 5只 1支 1只 1只 2、试剂 基准KHCHO、分析纯NaOH、酚酞指示剂 844 二、考核内容 1、0.1000mol/l NaOH溶液的标定 用分析天平准确称取在105-110?下烘干过的基准KHCHO 0.7000g(称取至8440.0002g),放入250ml锥形瓶中，移取25ml不含CO蒸馏水溶解(不溶时可在热2 浴中溶解，然后冷却至室温)，加2滴酚酞指示剂，用待标NaOH溶液滴定至溶液由无色变为红色，30s不褪色即为滴定终点。平行测定4次，同时做空白试验。 the real implementation of the "quasi, ruthless. Tough," requirement, carry forward the spirit of a nail, and the corrective measures The implementation of the nerve endings, do not let the rectification is not in place, not to retreat, the people are not satisfied. Pin four is to adhere to the reform and innovation. To reform the way of thinking and innovative courage to turn style, against four winds, the courage to face the contradictions, good at solving the chronic ills, dare to break the outdated customs and bad habits Hensha unhealthy tendencies, trees, fresh healthy. The five is to adhere to tackling the problem. That is the wind Su Ji and the education supervision combined, in order to establish a new system to promote the normalization of style building, long-term, to enhance the party spirit of honest and pragmatic people thought conscious action. The six is to insist on the completion of the third grasp the overall situation. Activity and end This year the goal of safety production work plan for next year, work together, to promote the activities and the work of production safety with both hands, two promotion, two not mistake. Two, rectification of the overall objectives and specific objectives: (a) the overall path around the "four focus", carried out the outstanding problems of the special rectification, the full implementation of the central and provincial Party committee clear the rectification task, effectively curb the "four winds", realize the overall improvement of Party and government. The point is: focus on the people, the people, convenience, and resolutely curb the bureaucratic style of work; looking to stimulate grassroots vitality, resolutely curb the Wenshan sea; focus on the cadres honest, clean government, politics, and resolutely curb exceed the standard Quasi occupied office space, Gongjusiyong, public funds, extravagance of the wind; focus on establish a correct view of achievements, the concept of power, and resolutely curb acts against the interests of the masses. Accelerate the system reform and construction, improve the people honest and pragmatic normalization system, constantly consolidate and expand educational practice achievements, make people satisfied. The recent reform goal: Political Quality Bureau and all Party members and cadres, further improve the quality of the business; the "four winds", "two" problem has been effectively solved. The middle goal of the reform: "opposition party and government austerity waste 三、原始记录及计算结果 表一:NaOH标准溶液标定数据记录 项目 1 2 3 4 测定次数 m倾样前/g 样 品m倾样后/g 称 量 m KHCHO/g 844 滴定管初读数/ml 滴定管终读数/ml 实际消耗NaOH体积/ml 空白Vo/ml c(NaOH)/mol/L c( NaOH )/mol/L 相对极差/% the real implementation of the "quasi, ruthless. Tough," requirement, carry forward the spirit of a nail, and the corrective measures The implementation of the nerve endings, do not let the rectification is not in place, not to retreat, the people are not satisfied. Pin four is to adhere to the reform and innovation. To reform the way of thinking and innovative courage to turn style, against four winds, the courage to face the contradictions, good at solving the chronic ills, dare to break the outdated customs and bad habits Hensha unhealthy tendencies, trees, fresh healthy. The five is to adhere to tackling the problem. That is the wind Su Ji and the education supervision combined, in order to establish a new system to promote the normalization of style building, long-term, to enhance the party spirit of honest and pragmatic people thought conscious action. The six is to insist on the completion of the third grasp the overall situation. Activity and end This year the goal of safety production work plan for next year, work together, to promote the activities and the work of production safety with both hands, two promotion, two not mistake. Two, rectification of the overall objectives and specific objectives: (a) the overall path around the "four focus", carried out the outstanding problems of the special rectification, the full implementation of the central and provincial Party committee clear the rectification task, effectively curb the "four winds", realize the overall improvement of Party and government. The point is: focus on the people, the people, convenience, and resolutely curb the bureaucratic style of work; looking to stimulate grassroots vitality, resolutely curb the Wenshan sea; focus on the cadres honest, clean government, politics, and resolutely curb exceed the standard Quasi occupied office space, Gongjusiyong, public funds, extravagance of the wind; focus on establish a correct view of achievements, the concept of power, and resolutely curb acts against the interests of the masses. Accelerate the system reform and construction, improve the people honest and pragmatic normalization system, constantly consolidate and expand educational practice achievements, make people satisfied. The recent reform goal: Political Quality Bureau and all Party members and cadres, further improve the quality of the business; the "four winds", "two" problem has been effectively solved. The middle goal of the reform: "opposition party and government austerity waste 建德市工业技术学校技能节竞赛试卷 化学分析工技能竞赛试卷 学号:______ 班级:__________ 姓名:__________ 装 订 线 序作业分考评扣得考评内容 操作要求 号 项目 值 记录 分 分 1. 水平 2.清扫 3.调零 天平 1 每错一个扣0.5分，扣完为止。天平已 准备工作 开启不用预热。 1.称量物放于盘中心 2.在接收容器上方开、关称量瓶盖 3.敲的位置正确(上方) 基 4.手不接触称量瓶或称量瓶不接触接收准 容器 物 5.称量瓶不置于台面上(只能在天平或及 称量操作 4 干燥器内) 试 6.边敲边竖 一 样 7.及时盖干燥器 的 8.添加样品次数?3次,每多一次扣0.5称 分,最多扣1.0分 量 以上每错一项扣1分 (10 分) ?5%,称量范围??10%(以误差最大者 基准物 计),扣1分/个 4 称量范围 称量范围,?10%，扣2分/个 称量范围??5%不扣分 1.清扫天平盘 2.复原天平 3.登记 4.结束工作 1 放回凳子，每错一处扣0.5分 1、洗涤使用溶液过多;(1分) 移液管 2 2、润洗不准确;(1分) 润洗 移液3、洗涤不足三次。(1-3分) 管的1.移液管擦入溶液前或调节液面前未用二 操作纸擦拭管尖部、吸空;(1分) 移液管 (4分) 2 2.移液管擦入溶液过深或过浅，(1分) 操作 3、移液管不垂直，未停留15s放溶液。 (2分) 1.将壁上固体全部冲下 试剂基准物及试剂2.试剂沿壁加入 三 加人 2 加入 3.试剂按操作步骤的要求有序加入 (2分) 4.试剂按操作要求的数量加入 the real implementation of the "quasi, ruthless. Tough," requirement, carry forward the spirit of a nail, and the corrective measures The implementation of the nerve endings, do not let the rectification is not in place, not to retreat, the people are not satisfied. Pin four is to adhere to the reform and innovation. To reform the way of thinking and innovative courage to turn style, against four winds, the courage to face the contradictions, good at solving the chronic ills, dare to break the outdated customs and bad habits Hensha unhealthy tendencies, trees, fresh healthy. The five is to adhere to tackling the problem. That is the wind Su Ji and the education supervision combined, in order to establish a new system to promote the normalization of style building, long-term, to enhance the party spirit of honest and pragmatic people thought conscious action. The six is to insist on the completion of the third grasp the overall situation. Activity and end This year the goal of safety production work plan for next year, work together, to promote the activities and the work of production safety with both hands, two promotion, two not mistake. Two, rectification of the overall objectives and specific objectives: (a) the overall path around the "four focus", carried out the outstanding problems of the special rectification, the full implementation of the central and provincial Party committee clear the rectification task, effectively curb the "four winds", realize the overall improvement of Party and government. The point is: focus on the people, the people, convenience, and resolutely curb the bureaucratic style of work; looking to stimulate grassroots vitality, resolutely curb the Wenshan sea; focus on the cadres honest, clean government, politics, and resolutely curb exceed the standard Quasi occupied office space, Gongjusiyong, public funds, extravagance of the wind; focus on establish a correct view of achievements, the concept of power, and resolutely curb acts against the interests of the masses. Accelerate the system reform and construction, improve the people honest and pragmatic normalization system, constantly consolidate and expand educational practice achievements, make people satisfied. The recent reform goal: Political Quality Bureau and all Party members and cadres, further improve the quality of the business; the "four winds", "two" problem has been effectively solved. The middle goal of the reform: "opposition party and government austerity waste 每错一项扣0.5分 试漏方法(用蒸馏水或标准溶液均可)滴定管试漏 1 正确 1.润洗前尽量沥干 2.润洗量10,15mL 滴定管润洗 1 3.润洗动作正确 4润洗?3次 每错一项扣1分，扣完为止 1.装溶液前摇匀溶液 2.装溶液时标签对手心 装溶液 1 3.溶液不能溢出 4.赶尽气泡 四 每错一项或一次扣1分，扣完为止 滴 调零点正确，每错一次扣0.5分，扣完定 调零点 1 为止 操 1.滴定前用干净玻璃容器靠去滴定管下作 端所挂液 (10 2.终点后尖嘴处内没有气泡或挂液 分) 3.滴定操作与锥形瓶摇动动作协调(瓶 滴定操作 6 不碰管，无飞溅液) 4.终点附近靠液次数?4次,超出一次 扣1分 5.不成直线(虚线) 每错一项扣1分，扣完为止 滴定标定终点为:红五 终点5 1. 判断正确，每错一次扣1分。 色 (5分) 停留30s读数，读数正确，读数错误每 次扣1分，扣完为止; 读数六 读数 5 正确的判断标准为:允许误差最大为? (5分) 0.05 mL，读错的数据请另一位裁判复核 并签字。 仪器没有清洗扣3分，部分没有清洗每文明现场卫生、物品件扣0.5分;摆放不整齐、水迹太多、七 操作5 的清洗和摆放 废纸/废液乱扔乱倒，无结束工作或不(4分) 好，每错一处扣0.5分，扣完为止; the real implementation of the "quasi, ruthless. Tough," requirement, carry forward the spirit of a nail, and the corrective measures The implementation of the nerve endings, do not let the rectification is not in place, not to retreat, the people are not satisfied. Pin four is to adhere to the reform and innovation. To reform the way of thinking and innovative courage to turn style, against four winds, the courage to face the contradictions, good at solving the chronic ills, dare to break the outdated customs and bad habits Hensha unhealthy tendencies, trees, fresh healthy. The five is to adhere to tackling the problem. That is the wind Su Ji and the education supervision combined, in order to establish a new system to promote the normalization of style building, long-term, to enhance the party spirit of honest and pragmatic people thought conscious action. The six is to insist on the completion of the third grasp the overall situation. Activity and end This year the goal of safety production work plan for next year, work together, to promote the activities and the work of production safety with both hands, two promotion, two not mistake. Two, rectification of the overall objectives and specific objectives: (a) the overall path around the "four focus", carried out the outstanding problems of the special rectification, the full implementation of the central and provincial Party committee clear the rectification task, effectively curb the "four winds", realize the overall improvement of Party and government. The point is: focus on the people, the people, convenience, and resolutely curb the bureaucratic style of work; looking to stimulate grassroots vitality, resolutely curb the Wenshan sea; focus on the cadres honest, clean government, politics, and resolutely curb exceed the standard Quasi occupied office space, Gongjusiyong, public funds, extravagance of the wind; focus on establish a correct view of achievements, the concept of power, and resolutely curb acts against the interests of the masses. Accelerate the system reform and construction, improve the people honest and pragmatic normalization system, constantly consolidate and expand educational practice achievements, make people satisfied. The recent reform goal: Political Quality Bureau and all Party members and cadres, further improve the quality of the business; the "four winds", "two" problem has been effectively solved. The middle goal of the reform: "opposition party and government austerity waste 数据计算错误每次扣10分，从总分中扣除， 记录由此产生的连带错误不再扣分有效数据记录、计算及有八 处理 10 保留正确;计算过程保留五位有效数字， 效数字的保留 (10计算最终结果保留四位有效数字;每错 分) 一处扣1分，扣完为止; 极差的相对值?0.20%不扣分 0.20,极差相对值?0.25%扣2分 0.25,极差相对值?0.30%扣4分 0.30,极差相对值?0.35%扣6分 0.35,极差相对值?0.40%扣8分 精密度 25 0.40,极差相对值?0.45%扣10分 0.45,极差相对值?0.50%扣12分 0.50,极差相对值?0.55%扣16分 0.55,极差相对值?0.60%扣18分 标定极差的相对值,0.60%扣25分 九 结果相对误差?0.20%不扣分 准确度(精密度 (500.20,相对误差?0.25%扣1分 ,0.35%，准确 分) 0.25,相对误差?0.30%扣2分 度减半得分;精 0.30,相对误差?0.35%扣4分 密度,0.50%， 准确度为0分;0.35,相对误差?0.40%扣8分 25 真值是将精密0.40,相对误差?0.45%扣12分 度?0.35%并删0.45,相对误差?0.50%扣16分 除最大和最小0.50,相对误差?0.55%扣18分 值后的平均0.55,相对误差?0.60%扣20分 值)。 相对误差,0.60%扣25分 10 称量失败，每重称一次倒扣5分 由此产生连带10 溶液配制失误，每次扣6分; 重大十 错误仅扣最高 10 重新滴定一次扣6分 失误 扣分项 10 试样洒落、加错试剂，每次扣3分 0 伪造、凑数据等，总分以零分计 十总时120分钟 一 间 现场主考评员签名:__________ 现场副考评员签名:__________ 阅 卷考评员签名:__________ 时 间: ____年___月___日 the real implementation of the "quasi, ruthless. Tough," requirement, carry forward the spirit of a nail, and the corrective measures The implementation of the nerve endings, do not let the rectification is not in place, not to retreat, the people are not satisfied. Pin four is to adhere to the reform and innovation. To reform the way of thinking and innovative courage to turn style, against four winds, the courage to face the contradictions, good at solving the chronic ills, dare to break the outdated customs and bad habits Hensha unhealthy tendencies, trees, fresh healthy. The five is to adhere to tackling the problem. That is the wind Su Ji and the education supervision combined, in order to establish a new system to promote the normalization of style building, long-term, to enhance the party spirit of honest and pragmatic people thought conscious action. The six is to insist on the completion of the third grasp the overall situation. Activity and end This year the goal of safety production work plan for next year, work together, to promote the activities and the work of production safety with both hands, two promotion, two not mistake. Two, rectification of the overall objectives and specific objectives: (a) the overall path around the "four focus", carried out the outstanding problems of the special rectification, the full implementation of the central and provincial Party committee clear the rectification task, effectively curb the "four winds", realize the overall improvement of Party and government. The point is: focus on the people, the people, convenience, and resolutely curb the bureaucratic style of work; looking to stimulate grassroots vitality, resolutely curb the Wenshan sea; focus on the cadres honest, clean government, politics, and resolutely curb exceed the standard Quasi occupied office space, Gongjusiyong, public funds, extravagance of the wind; focus on establish a correct view of achievements, the concept of power, and resolutely curb acts against the interests of the masses. Accelerate the system reform and construction, improve the people honest and pragmatic normalization system, constantly consolidate and expand educational practice achievements, make people satisfied. The recent reform goal: Political Quality Bureau and all Party members and cadres, further improve the quality of the business; the "four winds", "two" problem has been effectively solved. The middle goal of the reform: "opposition party and government austerity waste