Chemistry, 21.03.2020 03:04 chunkymonkey090
Ndicators are commonly used during titrations to monitor the point at which an acid has fully been converted to its conjugate base (or when a base has fully been converted into its conjugate acid). Its important to pick the proper indicator so that its one color in the beginning, and a different color once the acid or base has been fully converted. For example, in the titration of 1.0 M HCl, you start with only HCl and it gets converted to Cl- by the addition of strong base (HCl + NaOH → NaCl + H2O). What is the pH in the beginning of the titration when you have 1.0 M HCl? What is the pH when all of the HCl has been converted to NaCl? In the titration of 1.0 HF, you start with only HF and it gets converted to F- by the addition of strong base (HF + NaOH → NaF + H2O). What is the pH in the beginning of the titration when you have 1.0 M HF? What is the pH when all of the HF has been converted to NaF? Curcumin (found in turmeric) is an indicator with a pKa of 8.0 that turns from yellow to red. Would curcumin be a good indicator to monitor the titration of HCl? Would curcumin be a good indicator to monitor the titration of HF?
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Chemistry, 21.06.2019 17:30
The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide
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Chemistry, 22.06.2019 04:40
Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)
Answers: 2
Chemistry, 22.06.2019 17:00
Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness
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Chemistry, 22.06.2019 19:00
Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?
Answers: 1
Ndicators are commonly used during titrations to monitor the point at which an acid has fully been c...
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