{"id":3148,"date":"2014-02-25T18:43:00","date_gmt":"2014-02-26T02:43:00","guid":{"rendered":""},"modified":"2025-08-28T14:50:41","modified_gmt":"2025-08-28T21:50:41","slug":"3148","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/3148","title":{"rendered":"How do I run the AP Chemistry food dye lab with a colorimeter instead of a spectrophotometer?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">In Lab #1 of the 2013 AP Chemistry lab book published by AP Central, the student is directed to measure % transmittance (%T) of a series of solutions of blue 1 food dye.<\/p>\n<p class=\"wp-block-paragraph\">When using a colorimeter, Logger <i>Pro<\/i> 3 defaults to displaying both %T and absorbance, and the default graph is set up to plot absorbance vs. time. To hide the absorbance readings and set the data collection mode to Events with Entry requires a fair amount of work before students use Logger <i>Pro<\/i> 3 to collect data.<\/p>\n<p class=\"wp-block-paragraph\">Thus, we have prepared a special Logger <i>Pro<\/i> 3 file to use with this experiment. Download the file at:<br \/><a href=\"http:\/\/www2.vernier.com\/til\/3148\/vst_ap_chemistry_food_dyes.zip\"><a href=\"http:\/\/www2.vernier.com\/til\/3148\/vst_ap_chemistry_food_dyes.zip\">http:\/\/www2.vernier.com\/til\/3148\/vst_ap_chemistry_food_dyes.zip<\/a><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>In Lab #1 of the 2013 AP Chemistry lab book published by AP Central, the student is directed to measure % transmittance (%T) of a&#8230;<\/p>\n","protected":false},"author":8969,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[5296,280,281,5297,4331],"class_list":["post-3148","post","type-post","status-publish","format-standard","hentry","tag-ap-chemistry","tag-col-bta","tag-colorimeter","tag-food-dyes","tag-loggerpro-3"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/8969"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=3148"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3148\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=3148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=3148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=3148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}