Sodium alginate can be purchased from various online retailers, specialty food stores, or stores that sell ingredients for molecular gastronomy. It is also commonly found in health food stores or stores that carry baking and cooking supplies. Additionally, some larger supermarkets may carry sodium alginate in the baking or specialty foods section. **

Calcium chloride and alginate can be purchased from various sources such as specialty chemical suppliers, online retailers, and some local pharmacies or health food stores. These products are commonly used in food and pharmaceutical industries, so they can often be found in stores that cater to those markets. Additionally, they may also be available at some craft stores or scientific supply companies. It's important to ensure that you are purchasing food-grade or pharmaceutical-grade calcium chloride and alginate if you intend to use them for culinary or medical purposes. **

Sodium alginate is a water-soluble polymer, meaning it can only dissolve in water. This is because sodium alginate contains hydrophilic (water-attracting) groups, such as hydroxyl and carboxyl groups, which interact with water molecules through hydrogen bonding. These interactions allow the water molecules to surround and separate the sodium alginate molecules, causing them to dissolve and form a homogeneous solution. In non-aqueous solvents, these interactions do not occur, preventing sodium alginate from dissolving. **

Yes, I have experience with alginate molding material. Alginate is a popular choice for making molds of body parts or other objects due to its flexibility and ease of use. It is commonly used in the dental field for making impressions of teeth and gums, as well as in special effects and prosthetics for creating lifelike molds of body parts. Alginate is easy to mix and sets quickly, making it a convenient choice for creating detailed molds. However, it is important to work quickly with alginate as it has a short working time before it sets. **

As an AI language model, I do not have personal experiences, but I can provide information on alginate and konjac noodles. Alginate noodles are made from seaweed extract and are often used as a vegan and gluten-free alternative to traditional pasta. Konjac noodles, on the other hand, are made from the konjac plant and are low in calories and carbohydrates, making them popular in low-carb and ketogenic diets. Both types of noodles are known for their unique texture and are often used as a substitute for traditional pasta in various dishes. **

Alginate for making handprint molds can be purchased at art supply stores, craft stores, or online retailers that specialize in sculpture or mold-making materials. Some popular online platforms where alginate can be found include Amazon, Blick Art Materials, and Sculpture Depot. It is important to ensure that the alginate purchased is specifically designed for mold-making purposes to achieve the best results. **

The formula for sodium alginate is (C6H7NaO6)n, where n represents the number of repeating units in the polymer chain. The formula for calcium lactate is Ca(C3H5O3)2, which represents the calcium salt of lactic acid. When sodium alginate and calcium lactate are mixed with water, they form a gel through a process called spherification, which is commonly used in molecular gastronomy to create spherical food items with liquid centers. **

Contemporary plays can be considered modern in the sense that they reflect current societal issues, values, and cultural norms. They often incorporate modern technology, language, and themes that are relevant to today's audience. However, the term "modern" can also refer to a specific historical period in theater, typically the late 19th and early 20th centuries, so in that sense, contemporary plays may not be considered modern. Overall, the classification of contemporary plays as modern depends on the context and definition being used. **