Products related to Aqueous:
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Materials Collection
The Materials Collection comprises of twenty magnetic and non-magnetic materialsThe set includesIron,Steel,Aluminium,Wood,Polythene,Brass,Rubber,Copper,Wool,Nylon,Cork,Lead,Zinc,Carbon,Glass,PVC,Cotton,Cardboard,Perspex,Nickel.
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Changing Materials Kit
This superb bumper pack of resources contains equipment and materials necessary to complete reversible and irreversible changes. Demonstrate the differences between dissolve and melt using salt to dissolve in water and wax to melt with heat. Great
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Separating Materials Kit
A kit to show how different mixtures of materials can be separated. It will allow children to understand terms such as evaporate, filter, insoluble and dissolve.The kit contains5kg sand1kg salt sodium chloride1kg rock salt10 x 100cm plastic beakers10
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Art Materials Trolley
Store all of your art materials with this Galt Art Material Trolley.Manufactured in quality hardwood.Supplied with strong non-marking castors.Featuring 3 shelves.Self assembly.Dimensions W100 x D50 x H79cm.
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Why does Na2HPO4 react alkaline in aqueous solutions?
Na2HPO4 reacts alkaline in aqueous solutions because it is a salt of a weak acid (H3PO4) and a strong base (NaOH). When dissolved in water, the salt dissociates into its ions, releasing the HPO4^2- ion. This ion can accept a proton from water, forming the H2PO4^- ion and hydroxide ions (OH^-), which increases the concentration of hydroxide ions in the solution, making it alkaline. Therefore, Na2HPO4 solution has a pH greater than 7, indicating its alkaline nature.
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What is the difference between alkaline and basic aqueous solutions?
Alkaline and basic aqueous solutions are often used interchangeably, but there is a subtle difference between the two. Alkaline solutions specifically refer to solutions that have a pH greater than 7 due to the presence of alkaline substances such as hydroxides of alkali metals. On the other hand, basic solutions refer to any solution with a pH greater than 7, regardless of the specific chemical composition. In other words, all alkaline solutions are basic, but not all basic solutions are necessarily alkaline.
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Why do solid hydroxides not conduct electricity, but their aqueous solutions do?
Solid hydroxides do not conduct electricity because the ions are held in a fixed position within the solid lattice structure, preventing them from moving freely to carry an electric current. However, when solid hydroxides are dissolved in water to form aqueous solutions, the ions are free to move and carry an electric current, allowing the solution to conduct electricity. This is because the water molecules surround and separate the ions, enabling them to move independently and conduct electricity.
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How do I calculate the pH value of the following aqueous solutions?
To calculate the pH value of an aqueous solution, you can use the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. If you know the concentration of a strong acid or base in the solution, you can use that to calculate the pH directly. If you have a weak acid or base, you will need to use the equilibrium constant (Ka or Kb) to calculate the concentration of hydrogen ions and then find the pH using the formula. Additionally, if the solution contains a salt, you will need to consider the hydrolysis of the salt to calculate the pH.
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Solid Materials Kit
A variety of materials in the form of rectangular blocks, intended to familiarise the student with the appearance, feel, texture, hardness and density of a range of common substances.Kit contains blocks of materials in the following sizesSoftwood,
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Materials Testing Kit
Contains 20 magnetic and non-magnetic objects some familiar, some not, neatly sealed in clear plastic pots with magnetic wands to test for magnetism.Good for individual and group work.Supplied in a strong storage case.Materials includeSea
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Characteristics of Materials Kit
The mini Science kits provide the non-specialist teacher with the time and confidence to engage children in various practical activities. Each kit focuses on a particular Science unit of the QCA Guidelines for Key Stage 2 and contains user friendly
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Static aluminium machinery steps 349028
Capacity kg 150. Construction Welded. Material Aluminium. No. of Treads Inc. Platform 1. Platform Depth mm 305. Platform Height mm 200. Platform Width mm 520. Tread Size mm 240.
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What is an aqueous phase?
An aqueous phase refers to a phase in a solution where water is the solvent. In this phase, water molecules surround and interact with solute molecules, allowing for various chemical reactions and interactions to take place. Aqueous phases are commonly found in biological systems, as many cellular processes occur in water-based environments. The presence of an aqueous phase is essential for the dissolution and transport of ions, nutrients, and waste products within living organisms.
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What is protolysis in aqueous solution?
Protolysis in aqueous solution refers to the reaction in which a proton (H+) is transferred from one substance to another in water. This process typically occurs between an acid and a base, resulting in the formation of the conjugate base of the acid and the conjugate acid of the base. In other words, protolysis involves the transfer of a proton from one species to another, leading to the formation of new chemical species with different properties. This proton transfer reaction is a fundamental process in acid-base chemistry and plays a crucial role in many chemical and biological systems.
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What tools, materials, and equipment do teachers work with?
Teachers work with a variety of tools, materials, and equipment in their daily work. Some common tools include whiteboards, markers, and projectors for delivering lessons. Materials such as textbooks, worksheets, and manipulatives are used to support student learning. Equipment like computers, printers, and audio-visual devices are also essential for creating engaging lessons and activities. Overall, teachers rely on a combination of traditional and modern tools to effectively educate their students.
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What happens to metal in aqueous acid?
When metal is placed in aqueous acid, a chemical reaction occurs where the metal reacts with the acid to form metal salts and hydrogen gas. This reaction is known as a single displacement reaction. The metal atoms lose electrons and are oxidized, while the hydrogen ions in the acid gain electrons and are reduced. This reaction can be quite vigorous, depending on the reactivity of the metal and the concentration of the acid.
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