powder (NaHCO3) better known to chemists as sodium bicarbonate‚ bicarbonate of soda‚ sodium hydrogen carbonate‚ or sodium acid carbonate. It is classified as an acid salt‚ formed by combining an acid (carbonic) and a base (sodium hydroxide)‚ and it reacts with other chemicals as a mild alkali. At temperatures above 300 degrees Fahrenheit (149 degrees Celsius)‚ baking soda decomposes into sodium carbonate (a more stable substance)‚ water‚ and carbon dioxide. Sodium bicarbonate was discovered by two
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PRODUCT LAUNCH GlaxoSmithKline trying for its second foray in the oral care market through Sensodyne toothpaste: Challenges Ahead Abstract In January 2011‚ GlaxoSmithKline Consumer Healthcare India (GSKCH) launched its global oral care brand Sensodyne in the Indian market. Sensodyne is a toothpaste for sensitive teeth and is a global leader in the premium toothpaste category across the world. The brand was previously owned by Block Drug Company INC and was acquired by GSK in 2001. This was the
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SALTS EVERYDAY First some words about salts in chemistry. Salts are ionic compounds that can result from the neutralization reaction of an acid and a base. They are composed of related numbers of cations (positively charged ions) and anions (negative ions) so that the product is electrically neutral (without a net charge). Salts can appear to be clear and transparent (sodium chloride)‚ opaque‚ and even metallic and lustrous (iron disulfide). In many cases the apparent opacity or transparency are
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compounds; • explain the general characteristics of the alkaline earth metals and their compounds; • describe the manufacture‚ properties and uses of industrially important sodium and calcium compounds including Portland cement; the biological significance of sodium‚ potassium‚ magnesium and calcium. • appreciate The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons‚ two groups
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the Calcium Carbonate out of the beaker and into the filter during step 5‚ would your percent yield be larger or smaller? If you do not wash all of the Calcium Carbonate out‚ then the percent yield would be smaller because there is enough calcium carbonate left in the beaker that would have attributed to the final yield. b. If you used tap water instead of DI water what do you think would happen? Why? If you used tap water‚ the coffee filter would have weighed more after the calcium carbonate went
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CONCLUSION After many class lab days‚ I concluded my unknown was Calcium Carbonate due to results from the Flame Test and Anion I Test. Throughout our lab days‚ my friends would help me determine various odors and colors of the substances which allowed me to confirm my answer. Also‚ I looked select test results up on the internet to see if they matched my observations. On our first lab day‚ I received my bottle and noticed a white precipitate in the bottom therefore‚ my unknown was insoluble. I
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Chemicals in Food Chemicals are added to food for (i) their preservation‚ (ii) enhancing their appeal‚ and (iii) adding nutritive value in them. Main categories of food additives are as follows: (i) Food colours (ii) Flavours and sweeteners (iii) Fat emulsifiers and stabilising agents (iv) Flour improvers – antistaling agents and bleaches (v) Antioxidants (vi) Preservatives (vii) Nutritional supplements such as minerals‚ vitamins and amino acids. Except for chemicals of category (vii)‚ none
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concentration on rate of reaction Plan: We are investigating the effect of nitric acid on calcium carbonate. We are doing this experiment‚ as we would like to understand the effect that acid rain has on limestone. We also want to understand how acid can have an effect on rate of reaction. The word equation for the reaction that will take place is: Calcium Carbonate + Nitric Acid Calcium Nitrate + Carbon Dioxide + Water The balanced symbol equation is: CaCO3 + 2HNO3
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reacting with calcium carbonate will result in fewer or more collisions between particles‚ so the calculated rate will
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carbon dioxide in the atmosphere that we don’t see or feel because its effects are happening underwater. When carbon dioxide is absorbed by seawater a chemical reaction occurs that reduces the seawaters pH‚ carbonate ion concentration‚ and saturation states of biologically significant calcium carbonate minerals. It decreases the pH of seawater‚ meaning it increases the seawater’s acidity. Over the past 250 years‚ ocean acidity has increased by 30 percent. At least one-quarter of the carbon dioxide CO2
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