base-weak acid and weak acid-strong base titrations Introduction Acid-base titrations are based on the neutralization reaction between the analyte and an acidic or basic titrant. When an acid and a base are present in a stoichiometric amount e.g. 1 mole HCl added to 1 mole NaOH‚ this means that the equivalent point has been reached in an acid-base system. The end point of an acid-base titration can be detected by the use of a pH indicator‚ a pH meter‚ or a conductance meter. The use of a pH meter to
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to the use of Agar. The methods performed included the use of two acids‚ HCl and acetic acid. Both acids were placed into an Agar-filled dish and‚ over increments of 15 minutes‚ data collection was taken based off the diffusion rate and the diameter length of both the HCl and the Acetic Acid. The resulting factor was the HCl exhibited a greater rate of diffusion‚ directly resulting in a lager diameter. This implies that the HCl ultimately has a smaller molecular weight. The next experiment was
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(cold and hot) ii. Dilute HCl (cold and hot) iii. Dilute HNO3 (cold and hot) _______________________________________________________________ IDENTIFICATION OF ACID RADICALS (ANIONS) This part is the classified into three groups: FIRST GROUP OF ACID RADICALS The acid radicals involved in this group are carbonate(CO32-)‚ Sulphide(S2-)‚ Sulphite(SO32-)‚ Thiosulphate(S2O32-) and nitrate(NO2-). The group reagent is dilute hydrochloric acid. EXPERIMENT Salt + dil. HCl OBSERVATION Effervescence
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NO2-Presence of nitrates of lead and bariumPresence of Zn2+Presence of NH4+Absence of nitrate‚ nitrite‚ zinc and ammonium ions | 3 | Solubility: a) In water b) In dil. HCl | SolubleSoluble in dil. HCl but insoluble in water | Water soluble saltsPresence of CO32- | 4 | Flame test:A paste of the salt was made with few drops of con. HCl and was introduced into the non-luminous flame. | (i)Brick red colour is imparted to the flame(ii) Crimson red(iii) Apple green(iv) Bluish green(v)No characteristic
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and dimensions of earning and life‚ in the same way the colonization brought cultures and norms to one center. Modern English developed after William Caxton established his printing press at Westminster Abbey in 1476.Printing also brought the standardization of the English language. Early Modern English (1500-1800) The early modern English period follows the Middle English period towards the end of the fifteenth century and coincides closely with the Tudor (1485–1603) and Stuart (1603-1714) dynasties
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aqueous ammonia and aqueous hydrochloric acid. • Compare your calculated enthalpy change with the experimental results. [pic] Figure 1 MATERIALS |LabQuest |2.0 M hydrochloric acid‚ HCl‚ solution | |LabQuest App
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create water to keep the pH at an acceptable range. Each group (I was with William Yung for this experiment) was tasked with testing one homogenate. The homogenate tested by our group was liquid spinach. Each team added HCl and NaOH to their homogenate. As we found out in our experiment‚ HCl was an acid so when added to the liquid spinach the pH lowered and NaOH‚ being a base‚ rose the pH level when added. The better the buffer the homogenate is‚ the less its pH changes
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MBA-SCOE 2012 A PREFERENTIAL STUDY OF DIFFERENT BRANDS OF LAPTOPS Submitted by: Sonali chinchkhede Shardul sheshgir Amruta sonawane Fahad siddiqui
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unknown volume of calcium carbonate in egg shells reacts with an excess of hydrochloric acid so that it is sure that a reaction is occurring. The excess HCl is then diluted because of the egg shell with a drop of phenolphthalein added and is then titrated in aliquots with sodium hydroxide solution. This is the reaction for determining the excess of HCl: 2HCl (aq) + CaCO3(s) -→ Ca2+ (aq) + CO2(g) + H2O(l) + 2Cl- (aq) Materials: eggshell burette‚ 50 cm³‚ and stand pipette + filler‚ 20 cm³
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balance and classify as combustion‚ combination‚ decomposition‚ single replacement‚ double replacement‚ or acid-base neutralization. HCl(aq) + Fe(s) C5H10 + O2(g) Pb(NO3)2(aq) + FeCl3(aq) HBr(aq) + MgO(s) KI(aq) + Pb(NO3)2(aq) Predict the products for the following chemical reaction. Write balanced molecular‚ complete ionic‚ and net ionic equations. Na2CO3(aq) + HCl(aq) ? Chapter 8 2.00 g of ammonia (NH3) are combined with 5.00 g of molecular oxygen to produce nitrogen monoxide and water
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