Investigation into How the Concentration of a Reactant Can Affect the Rate of Reaction Aim To plan an investigation that allows me to measure the effect of increasing the concentration of a reactant on the rate of reaction. With the results generated‚ it is also hoped to draw accurate conclusions and explain the results using scientific knowledge. Introduction Some reactions are fast‚ for example neutralisation or burning magnesium in air to produce magnesium oxide. However‚ other reactions
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acidic conditions. Seagrasses - form shallow water ecosystems along coasts that serve as nurseries for many larger fish‚ and can be home to many smaller organisms. Different species grow better in these acidic conditions. Coralline Algae - build calcium carbonate skeletons and help cement coral reefs. Coralline algae took 92 percent less area which smothers and damages coral reefs. Fish are also able to feel the effects of the acidic water. Fish have the ability to take in carbonic acid and put their
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time goes on‚ the ocean pH just gets worse and worse. (pH vs time graph) This is a serious issue that must be addressed soon. Oysters build a lot of their shells during the first 2 days of their life. They do this by using all the dissolved calcium carbonate that is underwater. However‚ recent increasing of ocean acidity changed all the chemistry of the ocean water. It pretty much makes it a lot harder for oysters to create a shell. “The region’s several hundred oyster growers had become a global
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Review Sheet for Gas laws Name ___________________________ 1. A gas at 2.3 atm occupies 12 liters. The volume is changed to 6 liters what is the resulting pressure? 2. A sample of gas is confined to 30ml at a pressure of 6 atmospheres. When the pressure is changed to 3liters‚ what is the resulting pressure? 3. A gas occupies 30 L. When the gas is heated from 50C to 100C‚ what is the final volume? 4. In a lab‚ Neon vapor occupied a volume of 1 liter at STP‚ the volume was changed to 4 liter
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PRACTICALS) Q4.How would you distinguish between the following: a)Calcium nitrate and lead nitrate using ammonium hydroxide Ans: Add ammonium hydroxide to the given substance‚ calcium nitrate does not form any ppt. with ammonium hydroxide. But lead nitrate forms chalky white ppt. With ammonium hydroxide b)Calcium nitrate and lead nitrate using sodium hydroxide solution Ans: Add sodium hydroxide to the given substance‚ Calcium nitrate forms milky white ppt. which is insoluble in excess. Lead
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The Effectiveness of Chalk Dust as Soil Neutralizer Queeneevi T. Quijano Carolyne B. Coronel Ergie P. Canillas IV-SSC A Mrs. Deborah Agustin Reseach Adviser TABLE OF CONTENTS Title Page Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Introduction . . . . . . . . . . . . . . . . . . . . . . .
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greater the lather‚ more cleaning ability the soap or detergent was capable of. The test of lather ability was done first by using tap water. The soap will make more bubbles with the soft water than with the hard water‚ because it reacts with the calcium and magnesium salts to form ’scum’‚ which is insoluble in water when mixed with hard water. This means there is less soap for making bubbles‚ or for cleaning. The tap water used to test the properties of the soap would most likely be considered hard
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ACIDS‚ BASES AND SALTS 1. What are indicators? What are the different types of indicators? An indicator is a dye which changes colour when put into an acid or a base. The different kinds of indicators are- Natural indicators- Litmus is a natural indicator‚ litmus solution is a purple dye which is extracted from a plant called lichen. Litmus turns red in acidic solutions and blue in basic solutions. Other
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Specimen Paper Centre Number Surname Other Names Examiner’s Initials Candidate Signature Question Mark Candidate Number For Examiner’s Use General Certificate of Secondary Education Foundation Tier 1 2 3 4 5 6 7 Science A Unit Chemistry C1 Chemistry 1F Chemistry Unit Chemistry C1 For this paper you must have: • a ruler • the Data Sheet (enclosed). You may use a calculator. F 8 9 TOTAL Time allowed ! 60 minutes Instructions ! ! ! ! Use black ink or black ball-point
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Citric acid is used mainly for home use‚ for getting rid of lime scale (kettles‚ baths‚ toilets)‚ in hard water areas. Citric acid is a weak acid found in fruits such as lemons and oranges. Like other acids‚ citric acid can help you remove stains and rust deposits from toilet bowls without causing any damage to the porcelain surface. Citric acid contains just enough acidic concentration to get the job done without etching or damaging household surfaces in any way. It doesn’t harm the environment
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