Procedure Text Material -22-10

The chemist ___ the pH of the solution daily to ensure accuracy.

• measure

• measures

• measuring

• measured

Analytical instruments ___ precise calibration before use.

• require

• requires

• requiring

• required

The laboratory technician ___ the samples carefully to avoid contamination.

• handle

• handles

• handling

• handled

Solutions ___ in a controlled environment to maintain stability.

• store

• stores

• storing

• stored

The spectrophotometer ___ the absorbance of light accurately.

• measure

• measures

• measuring

• measured

Chemists ___ the chemical reagents regularly to ensure quality.

• check

• checks

• checking

• checked

The titration process ___ precise measurements for accurate results.

• need

• needs

• needing

• needed

We ___ the glassware thoroughly to remove residues.

• clean

• cleans

• cleaning

• cleaned

The experiment ___ at a constant temperature to ensure consistency.

• conduct

• conducts

• conducting

• conducted

The analysts ___ the data carefully to identify trends.

• examine

• examines

• examining

• examined