Useful Verbs

absorb

http://dictionary.cambridge.org/dictionary/learner-english/absorb#translations

Amylose, which consists of helical polymer chains will absorb iodine to produce an intense blue coloured complex.

alter

http://dictionary.cambridge.org/dictionary/learner-english/alter

The valency state of a substance to be analysed must be altered before it can be titrated.

analyse

http://dictionary.cambridge.org/dictionary/learner-english/analyse

The copper solution you have analysed was obtained from a leaching experiment

ascertain

http://dictionary.cambridge.org/dictionary/learner-english/ascertain

The user should thus ascertain where the limits of to the equipment’s accuracy lie and be sure that they understand its reliability.

be aware

http://dictionary.cambridge.org/dictionary/learner-english/aware?q=be+aware+of%2Fthat

Before commencing work, make sure you are aware of the safety procedures.

calculate

http://dictionary.cambridge.org/dictionary/learner-english/calculate

Calculate the percentage of copper that was dissolved.

coincide

http://dictionary.cambridge.org/dictionary/learner-english/coincide

The level of the meniscus is allowed to fall until it coincides with the mark

commence

http://dictionary.cambridge.org/dictionary/learner-english/commence

Before commencing work, make sure you are aware of the safety procedures

concern

http://dictionary.cambridge.org/dictionary/learner-english/concern_1

In titrimetric analysis we are mainly concerned with using reagents as oxidizing or reducing titrants .

conduct

http://dictionary.cambridge.org/dictionary/learner-english/conduct_1

All tests were conducted according to instructions.

connect

http://dictionary.cambridge.org/dictionary/learner-english/connect

Uncovered electrical installations should not be left connected.

consider

http://dictionary.cambridge.org/dictionary/learner-english/consider

There are three sources of error that must be considered.

consist

http://dictionary.cambridge.org/dictionary/learner-english/consist-of-sth?q=consist

The burette consists of a long glass tube of uniform bore.

contact

http://dictionary.cambridge.org/dictionary/learner-english/contact_1

A 15 second delay is allowed before removing the pipette from contact with the flask.

contain

http://dictionary.cambridge.org/dictionary/learner-english/contain

The bulk of the volume is contained in the bulb.

correspond

http://dictionary.cambridge.org/dictionary/learner-english/correspond

It has a range of colours corresponding to all 14 pH units.

create

http://dictionary.cambridge.org/dictionary/learner-english/create

This may create a hazard.

damage

http://dictionary.cambridge.org/dictionary/learner-english/damage_1

Some items are highly sensitive and can be easily damaged.

deduce

http://dictionary.cambridge.org/dictionary/learner-english/deduce

Thus the amount of OH- present can be deduced from these two titres

depend

http://dictionary.cambridge.org/dictionary/learner-english/depend

Its accuracy depends on the method of manufacture.

detect

http://dictionary.cambridge.org/dictionary/learner-english/detect

The change of colour usually occurs over one pH unit or more and they are used to detect titration end-points.

develop

http://dictionary.cambridge.org/dictionary/learner-english/develop

A large number of indicators have been developed for redox titration.

dissolve

http://dictionary.cambridge.org/dictionary/learner-english/dissolve

Calculate the percentage of copper that was dissolved.

eliminate

http://dictionary.cambridge.org/dictionary/learner-english/eliminate

Such method errors can only be eliminated by either improvement of the theory or by checking the determination by an alternative method.

employ

http://dictionary.cambridge.org/dictionary/learner-english/employ

Meaning 2: use

It is usual to employ an indicator.

encounter

http://dictionary.cambridge.org/dictionary/learner-english/encounter_1

Large errors can be encountered in an overall operation which involves 'sampling'.

ensure

http://dictionary.cambridge.org/dictionary/learner-english/ensure

Ensure that no air bubbles are trapped in the measured volume.

estimate

http://dictionary.cambridge.org/dictionary/learner-english/estimate_1

Theory Titration is one method that can be used to estimate the concentration of an ion in a solution.

exist

http://dictionary.cambridge.org/dictionary/learner-english/exist

Usually organic dyes, which themselves can exist in acidic and basic forms due to dissociation, are used.

generate

http://dictionary.cambridge.org/dictionary/learner-english/generate

They have oxidation potential values corresponding to the potential generated by the titrant at the end-point

identify

http://dictionary.cambridge.org/dictionary/learner-english/identify

Meaning 3: Discover

The aim is to identify potential hazards.

immerse

http://dictionary.cambridge.org/dictionary/learner-english/immerse

The bulb pipette is filled by immersing the capillary tip in the solution.

include

http://dictionary.cambridge.org/dictionary/learner-english/include

This includes work with substances that have known health effects

indicate

http://dictionary.cambridge.org/dictionary/learner-english/indicate

Starch is used in several forms to indicate its presence.

involve

http://dictionary.cambridge.org/dictionary/learner-english/involve

Reactions involving such agents are known as oxidation-reduction reactions, often abbreviated to REDOX.

justify

http://dictionary.cambridge.org/dictionary/learner-english/justify

In many cases, the accuracy obtained in titration can be justified.

lead to

http://dictionary.cambridge.org/dictionary/british/lead-to-sth?q=lead+to

Failure to comply with them may lead to hazards.

liberate

http://dictionary.cambridge.org/dictionary/british/liberate

The amount of iodine liberated is measured by reacting it with a reducing agent.

limit

http://dictionary.cambridge.org/dictionary/british/limit

The final result may be of limited accuracy

locate

http://dictionary.cambridge.org/dictionary/british/locate

Meaning 2: find

Upon entering the laboratories, ensure to locate escape routes.

minimise

http://dictionary.cambridge.org/dictionary/british/minimize?q=minimise

Identify sources of error and how to minimise them.

neutralize

http://dictionary.cambridge.org/dictionary/british/neutralize?q=neutralise

NaOH is required to neutralize the excess acid.

observe

http://dictionary.cambridge.org/dictionary/british/observe

Allow good lighting conditions in order to observe the end-point colour change

obtain

http://dictionary.cambridge.org/dictionary/british/obtain

The copper solution you have analysed was obtained from a leaching experiment.

occupy

http://dictionary.cambridge.org/dictionary/british/occupy

Do not occupy bench space unnecessarily.

occur

http://dictionary.cambridge.org/dictionary/british/occur

Ensure that no losses occur due to the effervescence produced.

operate

http://dictionary.cambridge.org/dictionary/british/operate

Equipment should not be operated without permission and proper instruction from technical staff.

outline

http://dictionary.cambridge.org/dictionary/british/outline

Verb, Meaning 2: give the main facts

This section outlines the aims of the report.

perform

http://dictionary.cambridge.org/dictionary/british/perform

As an engineer, you will perform various projects and be expected to write a report.

prepare

http://dictionary.cambridge.org/dictionary/british/prepare

It is essential prepare good results tables.

present

http://dictionary.cambridge.org/dictionary/british/present

Verb, Meaning 1: give,show

It is sometimes helpful to present the results in graphical form.

provide

http://dictionary.cambridge.org/dictionary/british/provide

This Code of Conduct provides information relating to this.

realize

http://dictionary.cambridge.org/dictionary/british/realize?q=realise

It should be realized that the chief error involved may be associated with preparation work.

recommend

http://dictionary.cambridge.org/dictionary/british/recommend

It is best to use indicators recommended for a particular titration.

record

http://dictionary.cambridge.org/dictionary/british/record

Meaning 2: keep information

These random errors are usually in the last significant figure that has been recorded.

reduce

http://dictionary.cambridge.org/dictionary/british/reduce

This will reduce the effect of errors in weighing.

rely

http://dictionary.cambridge.org/dictionary/british/rely-on-upon-sb-sth?q=rely

Generally we rely on a theoretical concept.

remain

http://dictionary.cambridge.org/dictionary/british/remain

A faint straw colour remains.

remove

http://dictionary.cambridge.org/dictionary/british/remove

It is possible to remove the waters sequentially.

require

http://dictionary.cambridge.org/dictionary/british/require

2 moles of HCl are required to dissolve 1 mole of CaCO3.

respond

http://dictionary.cambridge.org/dictionary/british/respond

A mold culture responds poorly as an indicator.

specify

http://dictionary.cambridge.org/dictionary/british/specify

An accurately known amount of the specified substance should be employed.

submit

http://dictionary.cambridge.org/dictionary/british/submit

Samples need to be submitted to technicians.

suggest

http://dictionary.cambridge.org/dictionary/british/suggest

It is suggested that the conical flask is placed over a white tile or piece of white paper to allow good lighting conditions.

summarise

http://dictionary.cambridge.org/dictionary/british/summarize?q=summarise

The main intermediate results can then be summarised in this section.

transfer

http://dictionary.cambridge.org/dictionary/british/transfer

Solutions to be titrated are transferred by means of a bulb pipette.

vary

http://dictionary.cambridge.org/dictionary/british/vary

It contains varying amounts of sodium carbonate (Na2CO3) and other impurities

yield

http://dictionary.cambridge.org/dictionary/british/yield

The same experimental procedures may still yield slightly different values