1- 160.0 mL of 0.25 M HF with 230.0 mL of 0.31 M NaF Ka(HF)=6.8×1O^-4 Express your answer using two decimal places. pH = ? Please solve it asap...
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- = Syl.... A solution initial components B Gr... O ACIDS AND BASES Making qualitative estimates of pH change C Each row of the table below describes an aqueous solution at 25 °C. > The second column of the table shows the initial components of the solution. . Use the checkboxes in the third column to explain the type of the initial solution. The fourth column describes a change in the solution. • Use the fifth column to predict how the change in the solution will change its pH. D H₂O, HNO3 Explanation H₂O H,Ο, ΗΝΟ, We... H₂O Check 14.... initial type (check all that apply) acidic basic neutral acidic basic neutral acidic basic neutral acidic basic neutral Olo o Ol0 0 0000 change add NaNO3 add K Cl add NaOH 14..... add HCl A ALEKS-... effect of change on pH (check one) X Ο ΟΙΟ Ο pH higher pH lower pH the same pH higher pH lower pH the same pH higher pH lower pH the same OpH higher OpH lower OpH the same ♫ tv MacBook AirPlease Explain. Thank You Write a plan and theory with equations and pictures An unknown solid sample is given to you. It is a mixture of KHP & NaCl. Your goal is to find % of KHP in this given unknown sample. Given: Standardized NaOH (made last week) Unknown KHP Sample Computer with pH probe- Logger Pro-Vernier program Digital Burette pH meter What volume of a 0.100 M NaOH(aq) is required to neutralize 0.256 g of KHP ? 0.556 g of an unknown solid sample (KHP+NaCl) requires 12.45 mL of 0.100 M NaOH(aq). Calculate the % of KHP in the unknown solid sample.A biology experiment requires the use of a nutrient fluid buffered at a pH of 4.85, and 659 mL of the solution is needed. It has to be buffered to be able to hold the pH to within =0.10 pH units of 4.85 even if 5.00 x 10 mol of OH or 5.00 x 10 mol of H* ion enter. Record all your answers to three (3) significant figures. Pick the best acid and its sodium salt that could be used to prepare the solution. O Hydrocyanic acid and sodium cyanide (pK, = 9.21). O Nitrous acid and sodium nitrite (pk, = 3.15). Acetic acid and sodium acetate (pK, = 4.74). O Hydrofluoric acid and sodium fluoride (pK, = 3.17). Hint Calculate the minimum number of grams of the acid and its sodium salt that are needed to prepare the buffer solution. Mass acid i Mass sodium salt = i Hint Calculate the molar concentration of the acid and its sodium salt that are needed to prepare the buffer solution. Concentration acid = M Concentration sodium salt = M Hint on
- 0.2061 grams of an unknown organic acid was dissolved in about 50 mL of water in a 250 mL Erlenmeyer flask and titrated against 0.1000 M NaOH solution using bromothymol blue indicator. 15.56 mL of titrant was used to achieve end point. Calculate the Neutralization Equivalent. Write answer with two decimal places only. No units please.Volume of acetic acid (HC2H3O2) in the first titration (L) 10 mL Volume of acetic acid (HC2H3O2) in the second titration (L) 10 mL Normality of sodium hydroxide (NaOH) (N) 0.1 N Volume of sodium hydroxide (NaOH) in the first titration (L) 10 mL = ……..L Volume of sodium hydroxide (NaOH) in the second titration (L) 10 mL = ……..L Normality of acetic acid (HC2H3O2) in the first titration (N) Normality of acetic acid (HC2H3O2) in the secondtitration (N) Average normality of acetic acid (HC2H3O2) (N) Mass % of acetic acid (HC2H3O2) (%)Answer the following three questions based on the information given below. Consider a buffer made with 34.0 mL of 0.25 M butanoic acid (HC4H-O2) and 16.0 mL of 0.46 M sodium butanoate (NAC4H7O2). The K, for butanoic acid (HC H-O,) is 1.5 X 10 5. Round all numerical answers to the 100en place (2 decimal places). Assume 298 K. What is the pH, if 20.0 mL of 1.0 M NAOH is added to this buffer? Type your answer..
- Maleic acid (H2C4H2O4, represented by H2M) is the precursor of malic acid widely used in industry. food as an acidulant and in the pharmaceutical industry it is used in the treatment of wounds. This acid can be determined by neutralization titration. Answer the items below about this determination. a) Considering a 15.0 mL sample of maleic acid-based product used in industry, determine the maleic acid concentration, in mol/L, in the sample knowing that 21.7 mL of a solution of 0.1120 mol/L NaOH for complete neutralization of this acid. How many grams of maleic acid were in the sample analyzed and what is its percentage (%, m/v) in the sample? [Answer; m=0.1405 mol/L; percentage = 0.9365%] NaOH(aq) + H2M(aq) ----> Na2M (aq) + H2O(l) b) And Suggest an appropriate indicator for the titration of this acid by looking at the titration curve profile below (image)Exactly 10.66 ml of 0.066 M strong acid is added to a 30.00 ml. sample of a 0.068 M weak base solution. What is the pH at this point in the titration? K for the base is 2.51x10-5. REPORT YOUR ANSWER TO 2 DECIMAL PLACES. DO NOT INCLUDE UNITS. Type your answer....A 0.1-L unbuffered solution needs the pH adjusted from 6.8 to 2. How many microliters of a 6 molar HCI solution need to be added to adjust the pH? Report your answer to four decimal places. For this question: • Assume the volume of HCI being added is negligible and the total volume of the solution does not change. • The volume of the solution is *not* 1 L like it was in the practice pools. • The question requests your answer be reported in uL (microliters)!
- The pH of the standard solution were measured with a pH meter three times and the following data were obtained: 6.98, 7.20, and 7.22. If the pH of the standard solution is 7.00, this pH meter would provide the correct results at the 95% confidence level. Is this statement true or false? True FalseGSS CHEMISTRY GT 9 Schoology G Compare the concentre x W Word Document3a A bcps.schoology.com/common-assessment-delivery/start/4979553967?action3Donresume&submissionld%-564185 PS Links S Home | Schoology Word O Original NBA strea. O Driver Education, O. Show What You Know: pH & pOH Compare the concentrations of H* and OH" for solutions that are acidic, basic, and neutral. B I !!!How many grams of dry NH,Cl need to be added to 2.30 L of a 0.700 mol L solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.90? K, for ammonia is 1.8 x 10-5 Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HA mass of NH, Cl = Value Units Submit