In an experiment about dissolving sugar in water, we put sugar in water. What should we do next? A. Add more sugar. B. Stir the water. C. Take out the sugar. D. Add some salt. 相关知识点: 试题来源: 解析 B。把糖放入水中后应该搅拌水。A 选项再加糖不是下一步;C 选项把糖拿出来...
Add this dissolving candy cane experiment page to a science journal to extend the activity for older kids! Pin #2 Candy Cane Experiment: Different Liquids This candy cane experiment explores how fast the candy cane dissolves in different solutions that you can easily make up for yourself, salt ...
Is salt dissolving in water a spontaneous process? Explain. How long will it take to plate 5.0 g of Ni using a current of 50.0 A and starting with a solution of Ni2+?Explore our homework questions and answers library Search Browse Browse...
I’ve found that boiling water helps dissolve the salt the fastest. While the water is boiling, the kids can wrap a pipe cleaner around their dinosaurs. Once the water is boiling, pour in the salt. It usually takes about half a regular-sized container of salt to make one jar of supersa...
Stir the salt until it is dissolved. Next, add a half cup of water and 1 tablespoon of sugar to the sugar water glass. Stir until the sugar is dissolved. Then, add a half cup of water and 1 tablespoon of baking soda to the baking soda water glass. Stir until the baking soda is...
After completing the extraction, an acid, such as hydrochloric acid, is added to the basic aqueous solution causing the sodium carboxylate salt to change back to the default carboxylic acid, which will precipitate out of solution since it is water insoluble. Recrystallization is a technique when ...
Artificial seawater (ASW) was made by dissolving Instant Ocean (Aquarium Systems, Sarrebourg, France) in deionised water to achieve a concentration of 1.025 s.g. (Pechenik et al., 2019). Once the salt was completely dissolved, the artificial seawater was sterilised by passage through a 0.2 ...
Why does saltwater freeze, but salt is used to melt ice? How does adding salt affect the freezing and melting of water? How could you separate salt dissolved in water? What is the purpose of sunlight in the TLC experiment? Is salt dissolving in water a ...
pouring water into the paper cup and floating the handicraft; making a liquid by dissolving a pigment in the water; pouring the liquid into the bottle by using the dropper, and introducing the handicraft into the bottle; fully filling cooking oil up to an entrance of the bottle by using the...
This paper presents an analysis of the scientific reasoning of a dyad of secondary school students about the phenomenon of dissolution of gases in water as they work on this in a simulated laboratory experiment. A web-based virtual laboratory was developed to provide learners with the opportunity ...