https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:mixtures-and-solution/v/concentration-of-a-solution 2023-06-26T12:36:08.867767149Z Concentration of a solution How can we describe the differences between these two mixtures: One with 1 teaspoon of salt in water and other with 4 teaspoons of salt in water. Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Concentration of a solution How can we describe the differences between these two mixtures: One with 1 teaspoon of salt in water and other with 4 teaspoons of salt in water. Let's find out! https://cdn.kastatic.org/ka-youtube-converted/gtTJMNdY87A.mp4/gtTJMNdY87A.mp4 313 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:mixtures-and-solution/e/concentration-of-a-solution 2025-02-06T05:32:11.208946943Z Concentration of a solution Let's solve a few problems to calculate the concentration of a given solution. Aanchal Arora exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:solutions-suspensions-and-colloids/v/solution-suspension-and-colloid 2023-06-26T12:36:08.867767149Z Solution, Suspension and Colloid What is the difference between salt water, chalk in water and milk? They're all mixtures but how are they different? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Solution, Suspension and Colloid What is the difference between salt water, chalk in water and milk? They're all mixtures but how are they different? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/qFHYnSY1h9I.mp4/qFHYnSY1h9I.mp4 512 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:solutions-suspensions-and-colloids/e/differentiating-solution-suspension-and-colloids 2026-04-07T09:22:30.618598699Z Differentiating Solution, Suspension and Colloids. Let's solve a few problems to differentiate between a solution, a suspension and a colloid. Aanchal Arora exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:difference-between-pure-substances-and-mixtures/e/pure-substances-and-mixtures 2026-04-03T18:30:01.793877038Z Pure substances and mixtures Let's solve a few problems to understand the difference between pure substances and mixtures. Aanchal Arora exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/evaporation-is-matter-around-us-pure 2025-05-17T07:42:26.597170414Z Evaporation How to separate dissolved salt from water? We don't need heavy scientific equipment. This is something you can try at home, but safely! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Evaporation How to separate dissolved salt from water? We don't need heavy scientific equipment. This is something you can try at home, but safely! https://cdn.kastatic.org/ka-youtube-converted/-h5qOLU6jWI.mp4/-h5qOLU6jWI.mp4 194 Is matter around us pure? https://www.khanacademy.org/science/ncert-class-9-science/x7e8d66f732d28ce4:is-matter-around-us-pure/x7e8d66f732d28ce4:methods-to-separate-the-components-of-a-mixture/v/simple-and-fractional-distillation 2025-05-29T08:44:44.739717086Z Simple and fractional distillation Let's learn how chemicals can be separated and purified through distillation, a process which separates them based on their respective boiling points. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Simple and fractional distillation Let's learn how chemicals can be separated and purified through distillation, a process which separates them based on their respective boiling points. https://cdn.kastatic.org/ka-youtube-converted/hSaRyW81JnU.mp4/hSaRyW81JnU.mp4 570 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/filtration-is-matter-around-us-pure 2025-07-12T10:19:31.630915517Z Filtration How can we separate undissolved solid from liquid? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Filtration How can we separate undissolved solid from liquid? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/8ev0mReTwRU.mp4/8ev0mReTwRU.mp4 164 Is matter around us pure? https://www.khanacademy.org/science/ncert-class-9-science/x7e8d66f732d28ce4:is-matter-around-us-pure/x7e8d66f732d28ce4:methods-to-separate-the-components-of-a-mixture/v/basics-of-chromatography-dubv 2025-05-29T08:44:44.739717086Z Basics of Chromatography Let's understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exclusion, ion exchange, affinity, and HPLC. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Basics of Chromatography Let's understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exclusion, ion exchange, affinity, and HPLC. https://cdn.kastatic.org/ka-youtube-converted/5-y0s0L9qTI.mp4/5-y0s0L9qTI.mp4 556 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/separating-immiscible-liquids 2023-06-26T12:36:08.867767149Z Separating immiscible liquids How do we separate two liquids that do not mix with each other? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Separating immiscible liquids How do we separate two liquids that do not mix with each other? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/TNFNBaRyv_A.mp4/TNFNBaRyv_A.mp4 116 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/sublimation-is-matter-around-us-pure 2025-07-12T10:19:31.630915517Z Sublimation How can we separate powdered camphor from salt? Both are white and in powder form. Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sublimation How can we separate powdered camphor from salt? Both are white and in powder form. Let's find out! https://cdn.kastatic.org/ka-youtube-converted/kt87ruvWyTc.mp4/kt87ruvWyTc.mp4 190 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/crystallisation 2023-06-26T12:36:08.867767149Z Crystallisation How can we separate salt from water without heating? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Crystallisation How can we separate salt from water without heating? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/hBpmLf-8G2A.mp4/hBpmLf-8G2A.mp4 188 Is matter around us pure? https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/e/methods-to-separate-the-compounds-of-a-mixture 2026-04-03T18:30:01.793877038Z Methods to separate the compounds of a mixture. Let's solve a few problems to identify the methods to separate the compounds of a mixture. Aanchal Arora exercise