Carbonate

solution: The substance used for the standard solution must have a high degree of purity, preferably solid, because this is easier to measure (using a scale) and the substance can’t absorb water or release water. Oxalic acid and anhydrous sodium carbonate are used to make the standard solutions. The solid crystals must be weighed accurately and then transferred to a volumetric flask. It must then be filled up to the mark, so that we have a known mass in a known volume. The concentration can be…

There are two basic types of fireworks that form the big displays in the sky: firecrackers and sparklers. They are made in different ways. Firecrackers are rolled paper tubes that are filled with gunpowder called black powder or a fuse and flash paper. As you light the fuse, fire burns along the fuse and when it reaches the powder there is a loud explosion. Sparklers, though, make colorful, long lasting light. They contain more ingredients which means they burn longer and produce a light and…

2.1 Polydimethylsiloxane (PDMS) Polydimethylsiloxane (PDMS) own to a group of polymeric organosilicon compounds that are commonly stated as silicones. PDMS is optically clear, and, in general, non-flammable, non-toxic, and inert. PDMS is viscoelastic, meaning that at long flow times (or high temperatures), it acts like a viscous liquid such as honey. However, at short flow times (or low temperatures), it acts like an elastic solid such as rubber. In other words, PDMS will flow to cover the…

Solutions should be the cations of cupric nitrate, ammonium nitrate, zinc nitrate, calcium nitrate, aluminum nitrate, silver nitrate, ferric nitrate, and plumbous nitrate. The other seven solutions should be the anions of sodium hydroxide, sodium carbonate, potassium sulfate, sodium iodide, sodium phosphate, sodium chloride, and sodium chromate. Divide students into groups of two. Provide a bin of paper towels for the students to empty their well plates. Students: Obtain a pair of safety…

compounds. After performing the four anion tests, a positive identification was able to be made showing that the unknown compound contained a chloride ion since a white precipitate was formed from the reaction (Table 1). The sulfate, nitrate, and carbonate tests all yielded negative results when no precipitate was formed. The reaction of the chloride anion is as follows: Cl- + AgNO3 -->…

the reactions employed for the construction of novel indole–benzimidazole-based 1,2,3-triazole hybrids is demonstrated in Scheme 1. Compound 2 was prepared by treating propargyl bromide with 1H-indole-3-carbaldehyde (1) in presence of potassium carbonate in dry acetone at reflux temperature [26]. Compound 2 was further reacted by heating at reflux temperature with o-phenylenediamine (OPDA) in chloroform for 6 h afforded compound 3. Compound 3 coupled with variously substituted azides by…

pain within the body by reducing the production of a substance called prostaglandins which are “hormone-like substances” (Drugs 2017) that regulate the inflammation and cause the bodies pains and headaches.(Merck Animal Health) The Sodium Hydrogen Carbonate (NaHCO3) and Citric acid on the other hand react together in the aqueous solution to form sodium citrate. The sodium citrate produced is able to neutralise the HCl produced in the stomach by exchanging the H+ in the solution with the Na+…

every living cell has water in it. Every living cell in surrounded by fluids. Water dissolves more substances then any other liquid. The ions dissolved in water are needed by organisms for growth and to manufacture various body substances. Every organism must keep it internal body fluids in balance in order to survive. Water uptake must balance water loss. Water- roots and root hair absorb water from the soil by osmosis. Roots are long and have a large surface area. Roots have thousand of root…

ABSTRACT: Acid mine drainage has a prominent and damaging effect on the environment. This paper outlines the environmental impact, the chemistry behind the acid generation, and methods of treatment. The objective of this paper is to educate the reader about acid mine drainage, and what can be done to reduce this pollutant. INTRODUCTION/BACKGROUND: Acid mine drainage (AMD) often occurs at abandoned mining sites. Acid generation is the result of combining certain minerals, water, and an oxidant.…

teeth using egg shells and a variety of drinks is the closest to doing it with real teeth. Egg shells are close to teeth because they are both made of calcium and stain the same way. The only difference is the fact that eggshells are made of calcium carbonate and teeth are made calcium phosphate. That difference only affects the brittleness of the eggshells so that won’t negatively affect the…