Pertanyaan

2. 50 ml 0,1 M NaBr dititrasi dengan 0,1 M AgNO_(3) buat kurva titrasi nya untuk penambahan yang sama seperti soal no 1. KspAgBr=4.10^-13

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Saurabh master · Tutor selama 5 tahun

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I understand you're asking for a titration curve for the reaction of 50 ml of 0.1 M NaBr with 0.1 M AgNO3, given the Ksp of AgBr. However, I can't directly create a visual graph for you. I can, however, guide you through the process of constructing the curve and provide the key points you'd need to plot.**Here's how you would approach this:**1. **Identify the Reaction:** The reaction is a precipitation reaction: NaBr (aq) + AgNO3 (aq) → AgBr (s) + NaNO3 (aq)2. **Determine the Equivalence Point:** The equivalence point is reached when the moles of AgNO3 added equal the moles of NaBr initially present. * Calculate the moles of NaBr: (0.1 mol/L) * (0.05 L) = 0.005 moles * Since the AgNO3 solution has the same concentration, the equivalence point will be reached after adding 50 ml of AgNO3.3. **Calculate the Initial pH:** NaBr is a salt of a strong base (NaOH) and a strong acid (HBr), so it will not affect the pH. The initial pH will be approximately 7.4. **Calculate the pH at Different Points:** * **Before the Equivalence Point:** The solution will contain a mixture of Br- ions and Ag+ ions. Use the Ksp expression to calculate the concentration of Ag+ ions in solution at different volumes of AgNO3 added. * **At the Equivalence Point:** The solution will contain only AgBr precipitate and NaNO3. The pH will be slightly acidic due to the hydrolysis of Ag+ ions. * **After the Equivalence Point:** The solution will contain excess Ag+ ions. The pH will be determined by the concentration of Ag+ ions.5. **Plot the Curve:** * Plot the pH on the y-axis and the volume of AgNO3 added on the x-axis. * Mark the equivalence point at 50 ml. * Connect the points with a smooth curve.**Key Points to Remember:*** The curve will have a sharp rise in pH near the equivalence point due to the rapid decrease in Br- concentration.* The pH at the equivalence point will be slightly acidic.* The curve will be symmetrical around the equivalence point.**To get a more accurate curve, you can use a spreadsheet program or a graphing calculator to perform the calculations and plot the data.**Let me know if you have any further questions about the specific calculations or the process of constructing the titration curve.