water as well as the density was calculated. The same process was performed to calculate the density of an unknown substance. The third part Section C 5-25% of sodium chloride was prepared by the instructor. For each percent concentration of sodium chloride a 25 mL was prepared. Weighing the graduated cylinder before and after the sodium chloride was transferred the density were calculation. Pre- Laboratory Questions: 1. A metal sphere weighing 15.45 g is added to 21.27 mL of water in a graduated
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CHAPTER I INTRODUCTION Bad breath is one of the serious problems in the world especially those people who are unaware that they are adding bacteria in their mouth and became worse in the future. Researchers from the Institute of Dentistry at Queen Mary‚ University of London‚ discovered that dental problems affect up to 3.9 billion people -- more than half of the world’s population. According to World Health Organization‚ Risk factors for oral diseases include an unhealthy diet‚ tobacco use‚
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interesting questions scientist ask why does this chemical reaction happen when you mix this stuff together . Why do baking soda and vinegar react with each other? This happens because of an acid base reaction and also because baking soda is a bicarbonate and vinegar is an acid and when you mix them together fiss start to show up . What does this have to do with my science fair project? This has to do with my science fair project because it shows how the volcanic eruption shows in my paper mache
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a piece of moist and delicious banana bread is irresistible to most! Ingredients: 125g butter or margarine 1 cup castor sugar (white or brown sugar is okay though) 2 cups flour 2 eggs 3 large bananas‚ mashed 1 tsp vanilla essence 1 tsp bicarbonate of soda 1 tsp baking powder Method: 1. Preheat oven to 180°C 2. Cream butter and sugar together. Add eggs one at a time and beat well. 3. Add bananas and vanilla and fold in dry ingredients. 4. Bake in a greased loaf tin for 45 minutes. Variation:
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soon after spraying. This may irritate a person’s throat‚ and lungs. So the researchers decided to find an organic‚ health-friendly‚ and effective fire extinguisher‚ and found out that banana peels contain tartaric acid‚ which when added to sodium bicarbonate and water‚ produces carbon dioxide that removes oxygen from a fire‚ causing the fire to decrease and stop. STATEMENT OF THE PROBLEM This study will be conducted primarily to test the potential of Saba banana (Musa balbisiana) peels extracts
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Decomposition of Sodium Chlorate Mass‚ Moles‚ and the Chemical Equation Introduction: Sodium chlorate is used as a source of oxygen in emergency oxygen generators. So-called oxygen canisters or oxygen candles are found on airplanes‚ submarines‚ even the space station–anywhere where oxygen might be in short supply in case of an emergency. Sodium chlorate decomposes upon heating or in the presence of metals to give oxygen gas. What the chemical equation for the decomposition of sodium chlorate?
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measured using a styrofoam calorimeter. The three reaction are shown below. Reaction 1: The dissolving of solid sodium hydroxide in water. NaOH(s) ---> Na+(aq) + OH-(aq) + heat Reaction 2: The reaction of solid sodium hydroxide with dilute hydrochloric acid. NaOH(s) + H+(aq) + Cl-(aq) ---> Na+(aq) + Cl-(aq) + H2O Reaction 3: The reaction of sodium hydroxide solution with dilute hydrochloric acid solution. Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) --->
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Abstract. This report is about how to standardize a Sodium Hydroxide (NaOH) solution by titrating it with pure sample of Potassium acid Phthalate (KHC8H4O4). This experiment has two sections. The first section is to standardize the Sodium Hydroxide by titration. Three sample of 0.7 – 0.9 g of solid KHP are place into each of the three numbered Erlenmeyer flasks. 50 ml of distilled water are added to each three of it from graduated cylinder and constantly shake it until the KHP solution are completely
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which extinguishes specific type of fire. Class A contains pressurized water & is used on fires with paper‚ cloth‚ & wood. Class B contains carbon dioxide & is used on fire with gasoline‚ oil‚ paint‚ & cooking fat fires. Class C contains potassium bicarbonate or potassium chloride‚ is used on electrical fires because the chemical is non conducting agent‚ also used on burning liquids for a smothering action. Class ABC or combination is the most common at homes or schools. It contains a graphite type chemical
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mL beakers. The beakers containing the Gelusil antacid were filled with 25 mL of HCl. Three drops of an indicator were administered to every beaker before undergoing experimentation. Following the use of the indicator‚ a 50 mL burette with 50 mL of sodium hydroxide (NaOH) was used to drip minute amounts of concentration to each of the three 25 mL of HCl that contained the dissolved Gelusil antacid tablet. The first beaker turned slightly pink with 7.5 mL of NaOH. It contained 0.018 moles of HCl. The
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