Standardette Solution #503 | Sodium Hydroxide 0.02N, Refrigeration Req., 12/bx
Description
The Standardette Solution #503 (PN: T-10-252) is designed to standardize volumetric titrating solutions. Each box has a total of 12 ampoules. Each ampoule contains 10mL of sodium hydroxide to standardize 0.02N base.
They are precisely measured 10mL single use ampoules that deliver the equivalent of 40.00 mL of the solution to be titrated. Simply transfer the contents of the ampoule to your beaker or flask, add reagents or indicators and then titrate the mixture. Calculate normality with a simple ratio.
It is accurate to better than 1 part in 2000, resulting in pinpoint precision. Other strengths and chemicals available.
Please note: Refrigeration is required upon receival, and this product is considered HAZMAT FOR AIR SHIPMENTS.
Instructions for Use:
- Pour
- Unscrew Cap.
- Extract the plug carefully. Use a firm grip to avoid dropping.
- Rinse inside and outside of the bottom part of the blind plug with 5-10mL of water while holding it over the beaker to capture the liquid.
- Pour entire contents of the Standardette® Solution into the beaker.
- Rinse the inside of the ampule 5 times with intermediate swirling into the beaker. Use 5- 10mL of water for each rinse.
- Top up volume in beaker to ~80mL with DI water.
- Titrate
- Add 6 drops of Methyl Purple Indicator Solution. (CSL recommends Methyl Purple from GFS Chemicals: visual transition pH 4.8-5.4, purple-green.)
- Rinse a 50mL burette twice with about 10mL of acid solution.
- Clamp the burette in position and fill the burette to just above the zero mark with the acid solution.
- Release any bubbles from the tip of the burette.
- Bring the acid solution meniscus down to or below the zero mark, read, and record the burette reading to the nearest 0.01mL.
- Stir vigorously as the endpoint approaches, adding fractions of a drop of titrant using a glass stir rod.
- Stop at the endpoint which has steel-blue gray color. Since there are many shades of blue, take care to be consistent.
- Read the burette to the nearest 0.01mL.
- Complete the titration in exactly 3 minutes.
- Correct the volume of titrant to 20°C.
- Calculate
- Normality = Meq on the label /mL of acid solution used
Handling & Storage
- (a) Precautions for safe handling:
- Avoid inhalation. Ensure adequate ventilation and wear respiratory protection if necessary.
- Avoid contact with skin and eyes. Wear appropriate protection including gloves, face & eye protection.
- See sections 2(b) and 8(c).
- (b) Safe storage/ incompatibilities:
- Keep container tightly closed and upright in a dry and well-ventilated place.
- Carefully reseal and store upright once container has been opened.
- Store away from incompatible substances.
WARNING: Causes Skin Irritation and Serious Eye Irritation
- Bottle sealed with a blind plug. Do not squeeze. Carefully extract plug by pushing or pulling it firmly. Wash hands thoroughly after handling. Wear protective gloves, eye, and face protection.
- If on skin: Wash with plenty of water.
- If skin irritation occurs: Get medical advice/attention.
- Take off contaminated clothing and wash before reuse.
- If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
- If eye irritation persists: Get medical advice/attention.
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