active form of pepsinogen which is released into the stomach. Hydrochloric acid is also released into the stomach from parietal cells and makes the pH acidic‚ of a pH 1-3. This then activates chief cells to release pepsinogen‚ which functions in an autocatalyctic fashion. The hydrochloric acid mixed with pepsinogen generates pepsin‚ which can digest 20% of ingested carbon bonds. The primary structure of pepsin has an additional 44 amino acids which is useful in breaking proteins into smaller pieces called
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(i) Solution of barium chloride and sodium sulphate in water to give insoluble barium sulphate and the solution of sodium chloride. Ans:- (i) BaCl2 (aq) + Na2SO4 (aq) →BaSO4 (s) + 2NaCl (aq) (ii) Sodium hydroxide solution (in water) react with hydrochloric acid solution (in water) to produce sodium chloride and water. Ans. (ii) NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (liq) Q.4. A reaction of a substance X is used for white washing. (i) Name the substance X and write its formula.
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– Reactions with Acids: Learn these General Equations and their Examples: 1. ACID + METAL –––––––> SALT + HYDROGEN Hydrochloric acid + Magnesium Magnesium Chloride + Hydrogen 2HCl(aq) + 2Mg(s) 2MgCl(aq) + H2(g) Sulphuric acid + Zinc Zinc Sulphate + Hydrogen H2SO4(aq) + Zn(s) ZnSO4(aq) + H2(g) Nitric acid + Aluminium Aluminium Nitrate + Hydrogen 2HNO3(aq) + 2Al(s) 2AlNO3(aq) + H2(g) 2. ACID + BASE –––––––> SALT + WATER Hydrochloric acid + Copper II Oxide
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SNC2D0 Introduction: Heartburn is a form of indigestion by acid digestion it affects many people worldwide. A solution to defeat heartburn is to take an antacid. An antacid is medicine which neutralizes your stomach acidity. In this experiment‚ we will be using three liquid antacids which are Phillips Milk of Magnesia‚ Life Brand Milk of Magnesia and Diovol plus AF and determine which one is the most effective at neutralizing an acid. Purpose/problem: The purpose of this lab was to test Diovol
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Title : Measuremnt of pH With Indicators Aim : 1.To investigate concentration of hydrogen ions in hydrochloric acic and colour changes of indicators 2.To determine standard solutions and the unknowns Variables Independent variable : Concentration of hydrogen ions in hydrochloric acid.The presence of hydrogen ions is varied by using 5 different concentration of hydrochloric acid of 0.1mol/L‚0.01mol/L‚0.001mol/L‚0.0001mol/L‚0.0000mol/L Dependent variable : Colour changes of indicators
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The effect of molecular weight on the diffusion rates of Potassium permanganate (KMnO4)‚ Potassium dichromate(K2Cr2O7) and Methylene Blue^1 _________________ Group 3 Sec. X-1L February 6‚ 2012 ____________________ ABSTRACT The effect of molecular weight on the diffusion of substances were tested through the use of agar-water gel with three wells placed in a petri dish. Drops of three different substances namely: Potassium
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area for a faster rate of reaction. 10) Why is the experiment made in a well-ventilated room? To prevent burning of the substance. 11) explain the term (decant). Filter/Pour the liquid leaving the solid alone. 12) Why is concentrated sulphuric acid not used to dry ammonia? Because it will reach the base ammonia‚ which is neutralization reaction. 13) Why should samples be taken from different parts of the field? To get more accurate results. 14) Suggest why it is important to know the pH of
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how the presence of substances in the table above: copper(II) sulfate‚ iron(II) sulfate and cobalt(II) chloride) change rate of the reaction. Unit 2 learning Aim C – How fast is your reaction? – Part 4 Chemical equation calcium carbonate + hydrochloric acid calcium chloride + carbon dioxide + water CaCO3(s)
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In the first reaction‚ magnesium was burned to produce magnesium oxide. The reaction produced a bright light‚ which is evidence of a chemical change. The second reaction occurred as a result of solid magnesium reacting with hydrochloric acid. The reaction produced heat and bubbles‚ both indications of a chemical change. A wood splint was used to determine that the gas produced was hydrogen gas‚ hence the other product is magnesium dichloride. In the third reaction‚ ammonium carbonate was heated to
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heat is actually a “heat of solution” since no true chemical reaction occurs): NaOH (s) ---> Na+ (aq) OH¯ (aq)H1 2) Solid sodium hydroxide is dissolved in a hydrochloric acid solution: H+ (aq) Cl¯ (aq)NaOH (s) ---> Na+ (aq) Cl¯ (aq)O (l)H2 3) A solution of sodium hydroxide is mixed with a hydrochloric acid solution: H+ (aq) Cl¯ (aq)Na+ (aq) OH¯ (aq)---> Na+ (aq) Cl¯ (aq)O (l)H3
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