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- Please Answer my question from the picture im send... And note With same dengan.. God bless you .. Answer question from CO(SCN) until AgNO3... Thanks from fe2+ until Zn(NH3) me have solutionA 215 mL sample of a 0.500 M NaCl solution with an initial pHof 7.00 is subjected to electrolysis. After 15.0 minutes, a 10.0 mLportion (or aliquot) of the solution is removed from the cell andtitrated with 0.100 M HCl solution. The endpoint in the titrationis reached upon addition of 22.8 mL of HCl. Assuming constantcurrent, how much current (in A) was running through the cell?For water having a total alkalinity of 1.00x10^-3 mol/L and a pH of 10.34 what is the percentage contribution to alkalinity from CO32-? Please answer very soon will give rating surely
- A. To assay reducing agents using iodine, whst is the simple and most commonly employed method is by?The limiting current of lead in an unknown solution is 5.60 μA. One milliliter of a 1.00 × 10-3 Mlead solution is added to 10.0 mL of the unknown solution and the limiting current of the lead isincreased to 12.2 μA. What is the molar concentration of lead in the unknown solution?1. A pH electrode obeys the equation E= constant - 0.0592 pH. If the electrode potiential (E) is -0.105 V at 0.002500 M [H+], what is the electrode constant? 2. Using the electrode constant calculated abobe, determine the pH of a solution that gives the electrode potiential of -0.450V. Sketch the calibration plot for the pH electrode. Label the axes, electrode constant and the value of the slope on the calibration plot. Answer question 1
- (a) A Cr3+(aq) solution is electrolyzed, using a current of7.60 A. What mass of Cr(s) is plated out after 2.00 days?(b) What amperage is required to plate out 0.250 mol Crfrom a Cr3+ solution in a period of 8.00 h?A 2mL solution of hyrogen peroxide (1 g / mL) is titrated with permanganate in basic conditions. Write the balanced oxidation and reduction half-reactionWhy do both Reference and Indicator electrodes need in Potentiometric titration? answer at your own words ans answer to the point not any irrelevant words
- How long must a current of 0.40 AA A pass through a sulfuric acid solution in order to liberate 0.150 LL of gas at STP? Enter your answer in minuteThe electrochemical cell: SCE||H+(a=x)|glass electrodehas a potential of 0.2094 V when the solution in the right-hand compartment is abuffer of pH 4.006. The potential reading for an unknown solution measured by thesame glass electrode was –0.3011 V. Calculate the pH and the hydrogen ion activityof the unknown solution. Assume a Nernstian response for the glass electrode.There is a constant current which pasesed on a solution of CuSO for one hour and a 0.040 g of Cu deposited. What is the present current?