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In the reaction of PHP and NaOH, which of the following chemicals is the acid and which chemical is the base? PHP is the ام) NaOH is the Which of the following explain what a primary standard solution is? زل) A chemical whose concentration can be made with high accuracy and stored with virtually no compositonal change over time Is a chemical that is coloured red blue or yellow The first standard prepared in an experiment An acidic chemical whose concentration can be made up with a high degree of accuracy In Part to each of the five conical flasks, 20 ml of the sulfuric acid solution was transferred accurately. The phenol red indicator was added, and the samples were titrated with NaOH until the yellow colour change to a pale pink colour. Select the correct statement regarding this reaction C) The colour change corresponds to the end point of the titration and is observed when the ndicator changes colour. The choice of indicator is determined by which will indicator undergoes a colour change close to the equivalence point of the reaction. The colour change is due to the equivalence point of the reaction where the acid and base present in the exact mole ratio specified by the balanced equation The colour change is due to due to the equivalence point of the indicator, where the acid and base form of the indicator are present in the exact mole ratio specified by the balanced equation The equivalence point of the reaction, also referred to as the end point of the reaction and is when the acid and base are present in the exact mole ratio specified by the balanced equation In a titration 20.00 mL of 0.1042 mol/L PHP was titrated with NaOH until a colour change OCCUS in the presence of a suitable indicator The average titre value of NaOH used in the titration is 19.7 ml 00) What is the concentration of NaOH in mol/L? Provide your answer with three significant figures without units Use exponential (E) notation if you are providing the answer in scientific notation (eg 5.21x1078 is written as 5.21E+78). Balance the following equation for the reaction of H2SO with NaOH by selecting stoichiometric coefficients LE) Select 'T' if the stoichiometric coefficients is one. • NaOH + • H2SO4 • H20+ • Na+ + • S042 In a titration of NaOH and H2SO4, 20.25 mL of NaOH reacted with 20.00 mL portion of H2SO4 How many moles of NaOH reacted with H2SO4 in the titration The concentration of NaOH is 0.097 mol/L Provide your answer with three significant figures without units. Use exponential (E) notation if you are providing the answer in scientific notation (e.g. 5.21x1078 s written as 5.21E+78). m the reaction of PHP and NaOH, wrich of the following chemicals the aco and which chemicals the base? Puriste ca) NaOH is the Which of the following explain what a primary standard solution is? CH) A chemical whose concentration can be made with high accuracy and stored with virtually no compositional change cwer time Is a chemical that is coloured red, blue or yellow The first standard prepared in an expermant An acdie chemical whose concentration can be made up with a high degree of accuracy