LabFlow Study guides, Class notes & Summaries

How do you determine the last digit in any measured number on a non-digital instrument? - Estimate one digit past the smallest precisely known digit or marking. What is the correct reading of the volume in the pictured buret? Make sure to report your reading with the appropriate significant figures. - 39.95 mL When describing the uncertainty of a measurement, the term ------ refers to the closeness between a measurement and its accepted value, whereas the term ----- refers to the closeness...

The IR spectrum of a solid can be taken by dissolving it to create a solution. An appropriate solvent is __________because its IR stretches are ______ - The IR spectrum of a solid can be taken by dissolving it to create a solution. An appropriate solvent is [tetrachloromethane] because its IR stretches are [only in the fingerprint region]. Predict the frequency range (in cm-1) of each described structural feature. O-H stretch in a carboxylic acid C=O stretch in an aldehyde C-N stretch in ...

When using acids and bases, note that these substances are _____________. Make every effort to avoid contact with __________________. Be sure to wipe up any spills ___________. - corrosive; the skin and lab surfaces; immediately A neutralization reaction is a reaction between ___________ that results in the formation of ___________ and ________________. - an acid and base; water; salt Suppose you need to prepare 126.7 mL of a 0.270 M aqueous solution of NaCl. What mass, in grams, of NaCl ...

Which compounds could be represented by the empirical formula CH2? Select one or more: a) C2H6 b) C2H4 c) C3H6 d) C8H18 e) C2H2 f) C8H16 - b,c,f Determine whether or not each chemical formula is an empirical formula. a) Ba 3 (PO 4 ) 2 b) K 2 C 2 O 4 c) C 6 H 12 O 6 d) CaCO 3 e) NaMnO 4 - a) Empirical b) Not empirical c) not empirical d) Empirical e) Empirical To calculate the empirical formula, start by (1) using (2). Then, (3) by (4). - (1)converting the mass of each element ...

How do you determine the last digit in any measured number on a non-digital instrument? - Estimate one digit past the smallest precisely known digit or marking. What is the correct reading of the volume in the pictured buret? Make sure to report your reading with the appropriate significant figures. - 39.95 mL When describing the uncertainty of a measurement, the term ------ refers to the closeness between a measurement and its accepted value, whereas the term ----- refers to the closeness...

Under what conditions should a student inform the instructor of a lab injury? - The instructor must be informed of all laboratory injuries. Students must inform their instructor of all injuries that occur in lab. Instructors are best suited for evaluating injured students and following first aid or emergency protocol when necessary. Even if an injury appears minor or familiar, the presence of chemicals in the lab may cause the body to respond in unexpected ways. Instructors should be famili...