{"id":604,"date":"2024-06-19T09:02:25","date_gmt":"2024-06-19T06:02:25","guid":{"rendered":"https:\/\/sisu.ut.ee\/measurement\/self-test-5-3\/"},"modified":"2024-06-19T09:02:25","modified_gmt":"2024-06-19T06:02:25","slug":"self-test-5-3","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/measurement\/self-test-5-3\/","title":{"rendered":"Self-test 5.3"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam20\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-20\"><p>Here you can test your understanding of the concept of uncertainty source and how to recognize uncertainty sources in different situations.<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-20\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"   watupro-question-id-73\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">1. <\/span>Before the analysis sample pre-treatment is carried out. Some spiking experiments were made and recovery estimates (<em>R<\/em>) were obtained. In which case can we be sure that there is systematic loss of the analyte during sample preparation (the uncertainties are expanded uncertainties at <em>k<\/em> = 2 level)?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"73\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType73\" class=\"answerTypeCnt1\" value=\"checkbox\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices73\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-253\" class=\"answer   answerof-73 \" value=\"253\"><label for=\"answer-id-253\" id=\"answer-label-253\" class=\" answer\"><span><p>R= 0.98 \u00b10.22\u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-251\" class=\"answer   answerof-73 \" value=\"251\"><label for=\"answer-id-251\" id=\"answer-label-251\" class=\" answer\"><span><p>R= 0.99 \u00b10.02\u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-254\" class=\"answer   answerof-73 \" value=\"254\"><label for=\"answer-id-254\" id=\"answer-label-254\" class=\" answer\"><span><p>R=0.67 \u00b1 0.15<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-252\" class=\"answer   answerof-73 \" value=\"252\"><label for=\"answer-id-252\" id=\"answer-label-252\" class=\" answer\"><span><p>R=0.94 \u00b10.02\u00a0<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-1\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-73\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn73\" class=\"liveResultBtn1 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(73, 1);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"   watupro-question-id-74\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">2. <\/span>Potassium iodate (KIO<sub>3<\/sub>) solution<span style=\"font-size: xx-small;\"><span style=\"line-height: 0px;\">\u00a0\u00a0<\/span><\/span>was prepared in a 100 ml volumetric flask by weighing 0.1208 grams of KIO<sub>3<\/sub> (with purity of 99.5%) into the volumetric flask using an analytical balance with digital reading of 0.1 mg and filling the flask to the mark. The analytical balance was calibrated before weighing. What are the uncertainty sources of the potassium iodate molar concentration in the solution according to the presented data?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"74\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType74\" class=\"answerTypeCnt2\" value=\"checkbox\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices74\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-257\" class=\"answer   answerof-74 \" value=\"257\"><label for=\"answer-id-257\" id=\"answer-label-257\" class=\" answer\"><span><p>Accuracy of filling of the 100 ml volumetric flask<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-262\" class=\"answer   answerof-74 \" value=\"262\"><label for=\"answer-id-262\" id=\"answer-label-262\" class=\" answer\"><span><p>Impurities in the used potassium iodate<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-255\" class=\"answer   answerof-74 \" value=\"255\"><label for=\"answer-id-255\" id=\"answer-label-255\" class=\" answer\"><span><p>Possible difference of the temperature in case of calibration of the balance and weighing<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-263\" class=\"answer   answerof-74 \" value=\"263\"><label for=\"answer-id-263\" id=\"answer-label-263\" class=\" answer\"><span><p>Determination of the titration end-point<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-259\" class=\"answer   answerof-74 \" value=\"259\"><label for=\"answer-id-259\" id=\"answer-label-259\" class=\" answer\"><span><p>Rounding of the digital reading of the balance\u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-260\" class=\"answer   answerof-74 \" value=\"260\"><label for=\"answer-id-260\" id=\"answer-label-260\" class=\" answer\"><span><p>On the bottom of the 100 ml flask there were some deionized water drops before adding the potassium iodate and water<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-256\" class=\"answer   answerof-74 \" value=\"256\"><label for=\"answer-id-256\" id=\"answer-label-256\" class=\" answer\"><span><p>Standard deviation of the pipette calibration<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-258\" class=\"answer   answerof-74 \" value=\"258\"><label for=\"answer-id-258\" id=\"answer-label-258\" class=\" answer\"><span><p>Repeatability of the analytical balance<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-261\" class=\"answer   answerof-74 \" value=\"261\"><label for=\"answer-id-261\" id=\"answer-label-261\" class=\" answer\"><span><p>After filling the 100 mL flask to the mark there were deionized water droplets\u00a0on the flask neck (inside)<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-2\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-74\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn74\" class=\"liveResultBtn2 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(74, 2);\"><\/p>\n\t   <div style=\"display:none\" id=\"question-3\">\n\t<div class=\"question-content\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t<\/div>\n<\/div>\n\n<br>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons20\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; 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