Stoichiometry February 28th‚ 2013 Abstract: The reactions of the Sodium Hydroxide and two acids‚ Hydrochloric Acid and Sulfuric Acid were performed. The heat given off by these two reactions was used to determine the stoichiometric ratio and the limiting reactants in each experiment. Introduction: Coefficients in a balanced equations show how many moles of each reactant is needed to react with each other and how many moles of each product that will be formed. Stoichiometry allows us to
Premium Chemical reaction Sodium hydroxide
titrating with NaOH solution. After all the experiment we got hta salt witch we weighted and we got our results. Experiment reactions: .33w of Zn(OH)2 x moles Zn(OH)2/m. moles Zn(OH2) x 1molZnCI2/1 mol Zn(OH)2 x g molZnCI2/1 mol of ZnCL2 = .4531 grams of ZnCI2 .4531g of ZnCl2 x 1 moles ZnCI2/m. moles ZnCI2 x 1molZn/1 mol of ZnCI2 x 65.39 of Zn/1 mol Zn = .2174g Zn Materials needed: Scale Burette Beaker Spatula Erlenmeyer flask Prenolpthen (color indicator) ZnCL2 NaOH Tube Vacuum
Premium Chemistry Titration Concentration
The equilibrium concentrations were determined through a series of experiments where a known base‚ Sodium Hydroxide (NaOH)‚ was titrated into different reaction mixtures until an endpoint was reached. The equilibrium concentrations were then placed into the following equation to determine the constant: Kc = [R2OH] [ R1COOH]
Premium Chemistry Chemical equilibrium Chemical reaction
beginning pH for HCl is 1.90 which is lower than the 3.28 for acetic acid; thus‚ strong acid (HCl) means lower pH and weak acid (acetic acid) means higher pH. Then at the equivalent point for the titration HCl-NaOH the pH is 7‚ which mans that is neutral‚ in other words there are enough NaOH mmol to neutralize the HCl mmol present; also‚ the solution contains only water and NaCl the salt derived from the titration made. On the other hand‚ at the equivalent point for the titration acetic acid-NaOH the pH is
Premium Acid Acid dissociation constant PH indicator
Reshmi Nair Title: Determination of Aspirin through back titration. Aim: To determine the concentration of Aspirin in a tablet using NaOH and Hcl. Research Question: What is the concentration of Aspirin in a normal tablet? Background: Aspirin is the general name for acetylsalicylic acid (ASA); it is also the trademark of the drug produced by Bayer in Germany. In eighty countries‚ aspirin is a registered trademark‚ but in other places the term aspirin refers to ASA by itself or as an ingredient
Premium Paracetamol Ibuprofen Sodium hydroxide
Different buffer systems are effective over different pH ranges. The aim of this experiment is to investigate the ranges at which three different buffer systems: Acetic acid/NaOH‚ Tris/HCl and Gylcine/NaOH are effective. Materials and Methods Three titrations were carried out: Acetic acid/NaOH‚ Tris/HCl and Gylcine/NaOH. 25ml of the weak acid or weak base was put into a beaker and its pH measured. Then it was titrated with the strong acid or strong base respectively while measuring the pH of
Premium Acid dissociation constant PH Acetic acid
Volume of NaOH Needed to Neutralize 10.00 ml of Unknown HCl Molarity of NaOH= Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Initial volume of NaOH (ml) Final volume of NaOH (ml) Volume of NaOH used Average volume of NaOH Part II Determination of Percentage Composition of Vinegar Table 2 Volume of NaOH Needed to Neutralize 10.00 ml of Vinegar Molarity of NaOH= Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Initial volume of NaOH (ml) Final volume of NaOH (ml) Volume of NaOH used
Premium Chlorine Acetic acid Sodium chloride
recorder. Finally‚ in the third and fourth test tubes we added HCL and in the other NaOH and observed the effects. Data Tables and Observations: Data Table 1: Solubility or Reaction Mg Color: Silver‚ metallic Odor: None Effect of Heat: Color changed white Cold H2O: No effect‚ settled at bottom Hot H2O: No effect Litmus Red: Turned purple Litmus Blue: Turned purple Dilute HCL: Started smoking and fizzing Dilute NaOH: No effect Cu Color: Gold‚ copper‚ metallic Odor: None
Premium Chemical reaction Color Chemistry
this reaction is: M(OH)y + Y HCl [pic] Y H2O + M+y + Y Cl- Additionally‚ some brands of antacids use calcium carbonate as a neutralizing reagent. CaCO3 + 2 HCl (aq) [pic] H2CO3 (aq) + Ca2+ (aq) + 2 Cl-(aq) The carbonic acid formed in this reaction may undergo further reaction: H2CO3 (aq) [pic] H2O (l) + CO2 (g) Procedure Outline This experiment will involve several steps. The first step will involve a simple reaction to determine the concentration of the NaOH that will be used in this experiment
Premium Hydrochloric acid PH
excess of acid to dissolve all of the CaCO3 and then titrating the remaining H3O+ with NaOH solution can achieve the determination of the amount of acid‚ which has not reacted with the calcium carbonate. There are differences between amount of the acid (HCl) added and the amount left over after the reaction is equal to the amount used by the CaCO3. The reaction used to determine the leftover acid is: HCl (aq) + NaOH (aq) H2O + Na+ (aq) + Cl- (aq) Aim To measure the percent by mass of CaCO3 in an
Premium Titration Calcium carbonate Hydrochloric acid