Innovating Science AP Chemistry Determination Of Water Hardness

Innovation Science Determination Of Water Hardness Ap Chem Kit 2134237

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<div class="long-description"><h2>Description</h2>EBT binds with free metal ions in the water to form a pink complex. EDTA has a stronger affinity for the metal ions than EBT so when EDTA is added it replaces the EBT and the EBT returns to its blue, uncomplexed color. The blue color is used as the end point in the titration. A sample of tap water is treated with EBT indicator. If the indicator turns from blue to pink, metal ions such as calcium and magnesium are present. To determine the concentration of ions present, the sample is titrated with a known molar concentration of EDTA.</div><div class="feature-description"><h2>Features</h2><li>Provides hands-on science learning for students</li><li>Easy to use kit is perfect for students and beginners</li><li>Ideal for classrooms, labs and home school lessons</li></div><div class="in-box-description"><b>Includes:</b> <ul> <li>4 X 500 mL EDTA solution, 0.05 M</li> <li>2 x 200 mL buffer solution</li> <li>2 x 15 mL EBT Solution (Erichrome Black, 0.1%)</li> </ul></div>

In this experiment the indicator eriochrome black T (EBT) is used to signal the presence of ions in the water sample.

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Innovating Science AP Chemistry Determination Of Water Hardness

In this experiment the indicator eriochrome black T (EBT) is used to signal the presence of ions in the water sample.

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