Reaction pipet - Samenvattingen, Aantekeningen en Examens

First Semester Study Guide AP Chem Buck Exam 196 Questions with Verified Answers Salts containing which of the following ions are generally insoluble in cold water? a. nitrate b. acetate c. phosphate d. potassium e. ammonium - CORRECT ANSWER C. Phosphate Which of the following changes alone would cause a decrease in the value of Keq for the reaction represented above? a. Decreasing the volume of the reaction vessel b. Adding a catalyst c. Increasing the volume of the reacti...

Accuracy - correct answer Refers to a measurement giving the actual value for a sample with a limited deviation; example: determining the weight of a sample to be 1g plus or minus 0.001g Precision - correct answer Repeatability of a set of measurements, and getting very close values to each other. Test tubes - correct answer small tubes that allow a large number of samples to be arrayed in a rack for easy processing. Beakers - correct answer Wide-mouthed cylinders with a lip to allow po...

Accuracy - correct answer a measurement giving the actual value for the sample with limited deviation Precision - correct answer repeatability of a set of measurements on the same sample Test tubes - correct answer Good for small/large quantity of samples Round bottom flask - correct answer used for reaction, heating or vacuum Retort - correct answer round vacuum flask used for distillation Buret - correct answer Good for titrations, delivers liquid slowly Volumetric pipet - co...

Accuracy - Answer-Refers to a measurement giving the actual value for a sample with a limited deviation; example: determining the weight of a sample to be 1g plus or minus 0.001g Precision - Answer-Repeatability of a set of measurements, and getting very close values to each other. Test tubes - Answer-small tubes that allow a large number of samples to be arrayed in a rack for easy processing. Beakers - Answer-Wide-mouthed cylinders with a lip to allow pouring Erlenmeyer flasks - Ans...

OAT-Chemistry EXAM WITH 100% CORRECT ANSWERS Accuracy - correct answersa measurement giving the actual value for the sample with limited deviation Precision - correct answersrepeatability of a set of measurements on the same sample Test tubes - correct answersGood for small/large quantity of samples Round bottom flask - correct answersused for reaction, heating or vacuum Retort - correct answersround vacuum flask used for distillation Buret - correct answersGood for titrations,...

[A] = -kt + [A]0 - 0th order integrated rate law 1/[A] = kt + 1/[A]0 - 2nd order integrated rate law accuracy - how close a measured value is to the true value acid buffer capacity - the number of moles of H3O + per litre of buffer which are required to lower the pH by 1 unit (units = M) analytical balance - - used to determine a precise mass to the nearest +/- 0.0001 g - masses are always reported to 4 decimal places Are you allowed to change the flow rate after you've set it? - no you ...

CWEA Grade I Laboratory Analyst, questions and answers 2023 Chloride - Major anion found in many natural waters - Can impart salty taste in H2O What increases concentration of chloride in wastewater Chloride in human diet and softeners flushed into sanitary sewer system 2 most prevalent methods of measuring chloride argentometric and mercuric nitrate Argentometric Titration of sample with standard solution of silver nitrate (AgNO3) - Indicator: Chromate ions (CrO4) -...

MTTC Integrated Science Secondary (94) Verified Answers What are the 5 steps in the Scientific Method? 1. Identify a problem or pose a question based on an observation. 2. Formulate a hypotheses. 3. Conduct experiments or tests the hypotheses. 4. Observe and record the results. 5. Draw a conclusion (was the hypothesis correct?). * peer review is also important. Metric Unit deca (da): x 10^1 Metric Unit hecto (h): x 10^2 Metric Unit kilo (k): x 10^3 Metric Unit mega (M): x 1...

MTTC Integrated Science Secondary (94) 100% verified What are the 5 steps in the Scientific Method? - ANSWER 1. Identify a problem or pose a question based on an observation. 2. Formulate a hypotheses. 3. Conduct experiments or tests the hypotheses. 4. Observe and record the results. 5. Draw a conclusion (was the hypothesis correct?). * peer review is also important. Metric Unit deca (da): - ANSWER x 10^1 Metric Unit hecto (h): - ANSWER x 10^2 Metric Unit kilo (k): - ANSWER x...

Analytical Balance - 5 sig figs or 4 if unstable and a line over the 4th digit Thermometer - Three sig figs (20.5) graduated cylinder (50mL) - 3 Sig Figs (50.2) Graduated Cylinder (10mL) - 4 sig figs (10.25) volumetric flask - 5 sig figs Buret - 4 sig figs (27.22) Pipet - 4 sig figs (.02500L) adding and subtracting sig figs - least number of decimal places added or subtracted - 12.2 + 5.44 = 17.6 multiplying or dividing sig figs - the least number is the number of sig figs you can have ...