Experiment 7 INVESTIGATING STOICHIOMETRY WITH SODIUM SALTS OF CARBONIC ACID Introduction In this experiment we are going to get a better understanding of chemical stoichiometry. We are going to be reacting sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) with hydrochloric acid (HCl). To start off the mass of two unknown substances (being the sodium bicarbonate and sodium carbonate) will be taken. We will need to construct balanced equations for both of the reactants with the HCl and
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Alhia Harris October 18‚ 2011 Biology Lab report Proteins are very important throughout the body. They have a lot of functions in cells. Antibodies are proteins that help cells rebuild the cells when they are destroyed. Transport proteins move substances from one place to another. Regulatory proteins control cellular metabolism in a way that cells throughout the body can have the right amount of glucose in the blood. A common protein is an enzyme; in cells they speed up chemical reactions. For
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Neutral urine is 7‚ since if the urine with a pH below this number is categorized as acidic and urine with a higher pH is alkaline. pH is playing a important role in the development of renal calculi. Acidic urine will lead to xanthine‚ cystine uric acid‚ and calcium oxalate stones. However alkaline urine can cause calcium carbonate‚ calcium phosphate‚ and magnesium phosphate stones. For protein‚ normally
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most likely because we put too much solid in the test tubes and not enough water to dissolve it. They should have dissolved because the anything with nitrate should be soluble. With the pH‚ when the mixture where compared with the chart all of them except NaCl where a shade of blue which means that they have a pH of 8-14‚ depending on the darkness of the shade‚ meaning that they are a basic solution. When reacting with the HNO3 most of the solutions had a color change to acidic which the addition
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Chemistry 12 lab 20-D Chemistry 12 Joanna Bragiel TA Solution | Colour of Uni. Indicator | pH | Type of hydrolysis | NaCH3COO | Blue- green | 9 | Anionic | NaCl | Green | 8 | Neither | (NH4)Cl | Green- yellow | 7 | Neither | (NH4)2SO4 | Green- Yellow | 7 | Neither | AlCl3 | Red-orange | 3 | Cationic | Ca(NO3)2 | Murky green | 7 | Neither | Fe2(SO4)3 | Red | 2.5 | Cationic | Na2CO3 | Dark blue | 9.5 | Anionic | Na3PO4 | Orange-red | 3 | Cationic | K2SO4 | Green | 7 | Neither
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in abnormal quantities present in the urine. APPARATUS : 1) Test tubes 2) Boiling water bath 3) Microscope 4) Slides and cover slips 5) Pasteur pipettes MATERIALS: 1) pH test strips 2) Benedict’s reagent PROCEDURES: Collect the urine samples in a container. Make sure to not spill anywhere in the lab. Complete the tests and all results/ observation are in a proper table. (A) Observation of urine 1) The urine is sniffed and the description of the urine is described. Terminologies
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57 then acts as a general acid catalyst and draws a proton away from the water molecule. The OH- ion then attacks the carbonyl carbon atom of the acyl group which forms another tetrahedral intermediate which breaks down to form the carboxylic acid product. The release of this acid then frees up the enzyme to continue
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themselves. ⋆ Their presence does not affect the end product. ⋆ They only need a small effort to change a large amount of substrate. ⋆ Enzymes are very specific and usually only speed up a single reaction. ⋆ Their rate of activity depends on the PH of the substance‚ the temperature of the substance and the concentration of both the substance and the enzyme. An enzyme fuses with its substrate and this makes an enzyme-substrate complex. Once this reaction has occurred‚ the complex will break
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Formal Lab Report | Chemistry | | Student name: Sara Hattar Grade: 10 ”C” | | Teacher: Christine Ziadat | | | Title: Investigating the effects of changing the concentration of an acid on the rate of reaction between HCl and Magnesium. Aim: In this experiment we are going to see the effects of using three different concentrations of HCl when added to Magnesium metal on the rate of reaction. Hypothesis: If the concentration of the acid increased in reaction between HCl (the acid) and
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Keeping conditions inside the body the same is called homeostasis. It’s not easy. Lots of things have to happen‚ e.g. energy transferred between body and environment‚ carbon dioxide is a waste product of respiration and has to be transported by the bloodstream to the lungs where it is breathed out‚ waste and waste products are filtered out of the blood and excreted in the urine. An incubator has a temperature sensor‚ a thermostat with a switch and a heater. Negative feedback happens when one factor
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