Solution Preparation from a Solid
Follow these visual steps to prepare accurate solutions from solid compounds
Safety glasses must be worn at all times. Clean any spills immediately. If solutions contact skin, wash thoroughly with water.
Safety is our top priority in the lab.
Required Equipment:
Wash all equipment, then rinse 3 times with deionized water
Proper cleaning ensures no contamination affects your solution concentration.
Required Equipment:
Use a weighing boat to measure the solid precisely
Record the exact mass - this determines your final concentration.
Add small amount of deionized water to beaker, add solid, rinse weighing boat 3x into beaker
Start with minimal water to ensure complete dissolution before transferring.
Stir mixture until solid is completely dissolved
Complete dissolution is essential before proceeding to the next step.
Use stir rod to guide pouring into volumetric flask, lift funnel slightly
Leave any undissolved solid in the beaker - do not force it through.
Add more water to beaker, stir, and decant again if solid remains
Caution: Don't add too much water overall - you'll dilute to the line later.
After visible solid is gone, rinse beaker 3x with deionized water
Add all rinses to the volumetric flask to ensure complete transfer.
Add deionized water quickly at first, then slow down at the neck
Use a squirt bottle for better control as you approach the fill line.
When ~1cm from line, add water drop by drop
Eye level with the line - bottom of meniscus must be exactly on the fill line.
If you overfill past the line, you must restart the entire procedure for precise work. The volume must be exact for accurate concentration calculations.
- • All solid is completely dissolved
- • Solution is clear with no visible particles
- • Meniscus bottom is exactly on the fill line
- • All equipment has been properly rinsed