1. In this experiment we measured K, for boraxNa,B,O,(OH), 8H,0(s)=2Na*(aq)+B,0,(OH),² (aq)+8H,0(1)write down K, for this reaction in terms of reactants/productspconcentrationsWe measured the concentration of the borate by titrating it withHCl to make boric acidB,O,(OH), (a) + 2 HCI( aq) + 3 H,O(I) → 4 H,BO, + 2CI (ag)the pH at the equivalence point is pH = 4.2. What indicator did we use, and what color was the indicatorat the equivalence point?3. At 48.2°C, 5.00ml of the saturated solution of bo ax wastitrated with 0.235M HCI. It took 23.00 mL of the a id toreach the equivalence point.1. What is the molarity of the tetra-borate anion in t esolution?2. What is Kn for borax at this temperature?

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1. In this experiment we measured K, for borax Na,B,0,(OH), 8H,0(s)=2Na*(aq)+ B,0,(OH),¯(aq)+8H,0(1) write down Kn for this reaction in terms of reactants/product concentrations

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter15: Solubility And Complex Lon Equilibria

Section: Chapter Questions

Problem 113MP: Aluminum ions react with the hydroxide ion to form the precipitate Al(OH)3(s), but can also react to...

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Applications of Molecular Spectroscopy

When light sources pass through the diffraction grating then light splits into different wavelengths. The light source produces two types of patterns that are shown as destructive and non-destructive. The light source is in the form of quanta that is quantitation.

Question

1. In this experiment we measured K, for borax
Na,B,O,(OH), 8H,0(s)=2Na*(aq)+B,0,(OH),² (aq)+8H,0(1)
write down K, for this reaction in terms of reactants/product
sp
concentrations
We measured the concentration of the borate by titrating it with
HCl to make boric acid
B,O,(OH), (a) + 2 HCI( aq) + 3 H,O(I) → 4 H,BO, + 2CI (ag)
the pH at the equivalence point is pH = 4.
2. What indicator did we use, and what color was the indicator
at the equivalence point?
3. At 48.2°C, 5.00ml of the saturated solution of bo ax was
titrated with 0.235M HCI. It took 23.00 mL of the a id to
reach the equivalence point.
1. What is the molarity of the tetra-borate anion in t e
solution?
2. What is Kn for borax at this temperature?

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