[cs_content][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Applying Chemical Ideas > Analysis of Organic Substances >[/cs_text][cs_text]Detection of carbon-carbon double bonds
- In a test tube, a sample is taken.
- Bromine water, which is yellow in colour is added to the sample. The bromine water, if turns colourless will confirm the presence of carbon-carbon double bonds i.e. alkenes.
[/cs_text][x_image type=”none” src=”https://easychem.com.au/wp-content/uploads/2019/06/carbon-carbon-double-bonds.jpg” alt=”” link=”false” href=”#” title=”” target=”” info=”none” info_place=”top” info_trigger=”hover” info_content=””][/cs_column][/cs_row][/cs_section][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Detection of hydroxyl groups
- Hydroxyl groups in organic compounds can be tested by the Iodoform test.
- If a sample, when heated with sodium hydroxide and iodine turns colourless from yellow, it reflects the presence of hydroxyl group.
[/cs_text][x_image type=”none” src=”https://easychem.com.au/wp-content/uploads/2019/06/hydroxyl-groups.jpg” alt=”” link=”false” href=”#” title=”” target=”” info=”none” info_place=”top” info_trigger=”hover” info_content=””][/cs_column][/cs_row][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Detection of carboxylic acids
- For detection of carboxylic acids, sodium hydrogen carbonate is added with a taken sample. If a brisk effervescence is observed, it indicates the presence of carboxylic acid because carboxylic acids react with sodium bicarbonate to produce carbon dioxide which results in the formation of the effervescence.
[/cs_text][x_image type=”none” src=”https://easychem.com.au/wp-content/uploads/2019/06/carboxylic-acids.jpg” alt=”” link=”false” href=”#” title=”” target=”” info=”none” info_place=”top” info_trigger=”hover” info_content=””][/cs_column][/cs_row][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”] [/cs_column][/cs_row][/cs_section][/cs_content]