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Forensic Chemistry Experiments - Print and E-Book

Info sui prodotti "Forensic Chemistry Experiments - Print and E-Book"

Each of the 15 experiments in this book kicks off with a case study designed to engage high-school and college-level chemistry students. Immerse them in the excitement of solving crimes through hands-on experimentation using Vernier sensors such as pH, pressure, conductivity, and temperature to investigate complex questions involving forensics. Students explore gas pressure through a failed bottle rocket launch, Beer’s law through a case of poisoned wine, and even more through engaging forensics investigations.

Electronic Version

  • 14 ready-to-use student experiments
  • Electronic access to up-to-date versions of the experiments
  • Instructions for data collection with Vernier Graphical Analysis app with Go Direct sensors. (Does not support data collection with Logger Pro or LabQuest App)
  • Essential instructor information, including teaching tips, suggested answers, and sample data and graphs
  • Word-processing files of the student experiments, so you can edit the files to match your teaching preferences
  • Complete equipment and supplies list
  • A generous site license­—buy one book and duplicate the experiments for your class

Printed Lab Book

  • When you buy the printed lab book you receive all of the resources listed for the electronic version, plus a printed copy of the book.
Bildungsstufe: Scuola media, Scuole medie superiori e professionali, Secundario II
Fach: biologia, chimica
Fachbereich: Biologie, Chemie
Hersteller: Vernier
lingua: inglese

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Accessory Items

Go Direct™ Temperature Sensor
La sonda di temperatura Go Direct è un robusto sensore di temperatura per uso generale che gli studenti possono utilizzare per monitorare la temperatura. Si collega direttamente alla piattaforma in modalità wireless tramite Bluetooth® o via cavo tramite USB. La sonda di temperatura Go Direct, robusta e multiuso, offre agli studenti il vantaggio della connettività ovunque e ovunque si lavori. Essendo anche impermeabile, Go Direct Temperature è più durevole dei sensori che sono semplicemente resistenti all'acqua. A differenza di un termometro tradizionale, Go Direct Temperature consente agli studenti di raccogliere misure di temperatura in tempo reale di un singolo caso o di un periodo di tempo. L'intervallo di temperatura e la funzionalità wireless rendono Go Direct Temperature il sensore ideale per le applicazioni reali. La sonda Go Direct Temperature può essere utilizzata in una varietà di esperimenti: Condurre reazioni endotermiche ed esotermiche. Studiare il congelamento e la fusione dell'acqua. Misurare il contenuto energetico degli alimenti. Esaminare l'assorbimento dell'energia radiante. Monitorare le condizioni ambientali. Specifiche tecniche: Intervallo di temperatura: da -40 a 125°C Intervallo di temperatura di manipolazione: da -10 a 45°C Precisione: ±0,25°C Tempo di risposta (tempo per il 90% della lettura): 20 secondi (in acqua, con agitazione) Connessioni: Senza fili: Bluetooth Con cavo: USB Incluso: Sensore di temperatura Go Direct Cavo micro USB Guida rapida

CHF 161.00*
Go Direct™ Conductivity Probe
The Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It features a built-in temperature sensor to simultaneously read conductivity and temperature. Automatic temperature compensation allows students to calibrate the probe in the lab and then make measurements outdoors without temperature changes affecting data. This temperature compensation can be turned off to perform conductivity studies as a function of temperature. The Go Direct Conductivity Probe has a range of 0 to 20,000 μS/cm to provide optimal precision in any given range. An alternating current at its electrodes prevents polarization and electrolysis, reducing contamination of solutions. Its ABS-body graphite electrode resists the corrosion typical in metal electrodes. The Go Direct Conductivity Probe can be used in a variety of experiments: Demonstrate diffusion of ions through membranes. Investigate the difference between ionic and molecular compounds, strong and weak acids, or ionic compounds that yield different ratios of ions. Measure Total Dissolved Solids (TDS). Specifications: Range: 0 to 20,000 μS/cm (0 to 10,000 mg/L TDS) Temperature compensation: Automatic from 5 to 35°C, can be turned off Temperature range (can be placed in): 0 to 80°C Cell constant: 1.0 cm-1 Description: ABS body, parallel carbon (graphite) electrodes Dimensions: 12 mm OD and 120 mm length Connections: Wireless: Bluetooth Wired: USB Included Go Direct Conductivity Probe Micro USB Cable

CHF 295.60*
Go Direct™ pH Sensor
The Go Direct pH Sensor is a general-purpose pH sensor used to monitor pH of aqueous solutions. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. The Go Direct pH Sensor is an important and versatile sensor for lab and field activities alike. It gives students the freedom to explore pH without the inconvenience of wires—no more spilled solutions or dangling wires. The Go Direct pH transmits live readings and captures data in real-time. The Go Direct pH Sensor can be used in a variety of experiments: Conduct acid-base titrations. Monitor pH change during chemical reactions. Test the pH and alkalinity of bodies of water. Investigate household acids and bases. This sensor is comprised of a pH electrode connected to a Go Direct Electrode Amplifier via a BNC connector. This design enables you to use the Go Direct Electrode Amplifier with other Vernier electrodes, such as the Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode. Specification: pH range: 0–14 Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference Shaft diameter: 12 mm OD Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution) Connections: Wireless: Bluetooth Wired: USB Included: Go Direct pH (includes Go Direct Electrode Amplifier) Micro USB Cable Quick-start guide 

CHF 242.60*
Go Direct™ SpectroVis® Plus Spectrophotometer
Lo spettrofotometro Go Direct SpectroVis Plus misura rapidamente l'intera lunghezza d'onda. Si collega direttamente alla piattaforma in modalità wireless tramite Bluetooth® o cablato via USB. Introducete i vostri studenti alla spettroscopia con l'economico spettrofotometro Go Direct SpectroVis Plus. In grado di collegarsi wireless o via USB, questo dispositivo può facilmente raccogliere l'intera lunghezza d'onda (assorbanza, trasmissione percentuale o intensità) in meno di un secondo. Una volta determinata la lunghezza d'onda di picco, è possibile stabilire la concentrazione di una soluzione (legge di Beer) o monitorare la velocità di reazione. Un percorso luminoso ridotto consente allo spettrofotometro Go Direct SpectroVis Plus di essere utilizzato per microlaboratori e applicazioni biochimiche con micro e semi-micro cuvette. Lo spettrofotometro Go Direct SpectroVis Plus può essere utilizzato in diversi esperimenti di spettroscopia: Determinare la lunghezza d'onda del picco per raccogliere dati sulla concentrazione della soluzione per studi sulla legge di Beer o per monitorare le velocità di reazione. Raccogliere uno spettro a lunghezza d'onda completa per misurare l'assorbanza, la trasmittanza percentuale, la fluorescenza (a 405 nm o 500 nm di eccitazione) o le emissioni. Condurre esperimenti di cinetica enzimatica. Effettuare studi sull'equilibrio di assorbanza vs tempo o assorbanza vs concentrazione. Effettuare biotest colorimetrici o fluorescenti. Utilizzate lo spettrofotometro a fibra ottica (VSP-FIBER) per misurare le emissioni provenienti da prove alla fiamma o da altre sorgenti luminose. Per un'analisi più dettagliata delle emissioni, prendete in considerazione lo spettrometro Vernier Emissions (VSP-EM). Spettroscopia con Go Direct SpectroVis Plus Per utilizzare lo spettrofotometro Go Direct SpectroVis Plus, scarica l'app gratuita Spectral Analysis. L'app è compatibile con computer, Chromebook e dispositivi mobili. Gli studenti possono anche collegarsi a LabQuest 2 o a un computer con Logger Pro per effettuare analisi. Specifiche Intervallo di lunghezze d'onda: 380 nm–950 nm Supporto per fluorescenza: due sorgenti di eccitazione centrate a 405 nm e 500 nm Intervallo di lunghezza d'onda riportato: ~1 nm tra i valori riportati (raccoglie 570 valori) Dimensioni: 16 cm x 10 cm x 5 cm Sorgenti luminose: Lampadina bianca a incandescenza, durata di circa 8.000 ore, calibrazione in un solo passaggio. Basato su LED, durata di circa 100.000 ore. Nessuna alimentazione esterna è richiesta.

CHF 1’037.70*
Go Direct™ Colorimeter
The 4-wavelength Go Direct Colorimeter measures absorbance or transmittance of a liquid sample. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Use this sensor to explore absorbance and percent transmittance in a variety of experiments including Beer’s law (absorbance vs. concentration) and kinetic studies (concentration vs. time). Students select between four wavelengths (430 nm, 470 nm, 565 nm, 635 nm) to set up their experiment. Go Direct Colorimeter features one-step calibration for all four wavelengths. It’s as simple as inserting a cuvette of distilled water and pressing the Calibrate button. Go Direct Colorimeter can be used in a variety of experiments: Conduct Beer’s law investigations. Determine the concentration of unknown solutions. Study changes in concentration vs. time. Monitor reaction rates. Specifications Range: 0 to 3 (absorbance) Useful range: 0.05 to 1.0 (absorbance) 90% to 10% transmittance (%T) Wavelengths: 430 nm, 470 nm, 565 nm, 635 nm Connections: Wireless: Bluetooth Wired: USB Included: Go Direct Colorimeter Micro USB Cable 3.5 mL cuvettes (15)

CHF 303.70*
Go Direct™ Gas Pressure Sensor
The Go Direct Gas Pressure Sensor measures the absolute pressure of a gas. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Use Go Direct Gas Pressure Sensor to monitor gas pressure in a variety of experiments. It records accurate absolute pressure readings relative to the perfect vacuum reference point inside the sensor, allowing you to go below atmospheric pressure or up to 400 kPa. Easily change the displayed units to any one of seven options (kPa, mmHg, inHg, mbar, psi, atm, torr). Includes a syringe, tubing, and stoppers to ease setup for experiments such as Boyle’s law. The Go Direct Gas Pressure Sensor can be used in a variety of experiments: Investigate Boyle’s law and Charles’ law. Investigate grip strength and muscle fatigue (using Gas Pressure Bulb, not included). Measure the production of oxygen gas produced when hydrogen peroxide is destroyed by the enzyme catalase. Monitor plant transpiration. Specifications: Range: 0 to 400 kPa Resolution: 0.03 kPa Maximum pressure that the sensor can tolerate without permanent damage: 450 kPa Connections: Wireless: Bluetooth Wired: USB Included: Vernier Go Direct Gas Pressure Sensor Tapered valve connectors (2) inserted into a No. 5 stopper Tapered valve connector (1) inserted into a No. 1 stopper Two-way valve 18 inch Tygon tubing with Luer Lock connectors 20 mL syringe White transpiration tubing clamps (2)

CHF 242.60*
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Go Direct® Mini GC™
Go Direct® Mini GC™ – Gaschromatograph Der neue Vernier Go Direct® Mini GC™ erkennt mehr Substanzen als sein Vorgängermodell. Möglich wird dies durch eine maximale Betriebstemperatur von 160 °C sowie einen Sensorchip mit umschaltbarer Empfindlichkeit. Als Trägergas wird standardmässig Umgebungsluft verwendet, was den Einsatz besonders einfach und sicher macht. Alternativ können auch andere Trägergase eingesetzt werden. Die Analyse sowie die Spitzenwertintegration erfolgen entweder über die Instrumental Analysis App (iOS / Android / Chromebook) als eigenständige Lösung oder über die Logger Pro Software am Computer. Detektor – MCCD Die fortschrittliche MEMS-GC-Chiptechnologie erlaubt den Betrieb mit Raumluft als Trägergas und bietet gleichzeitig die Flexibilität, andere Trägergase zu verwenden. Säule Hochwertige Restek MXT-502.2 Kapillarsäule Material: rostfreier Edelstahl Länge: 11 m Temperaturregelung Softwaregesteuerte Temperaturregelung von 30 bis 160 °C Säulentemperaturanstieg: maximal 10 °C pro Minute Kurze Aufwärmzeit: für die meisten Versuche unter 10 Minuten Druckregelung Softwaregesteuerte Druckregelung von 1 bis 21 kPa über Umgebungsdruck Injektion Inklusive hochwertiger 1-µl-Glasspritze mit zwei Nadeln Direkte Injektion von der Spritze in die Säule Flüssiges Injektionsvolumen: 0,01 bis 0,6 µl Anwendungen Der Go Direct® Mini GC™ eignet sich unter anderem zur: Identifikation unbekannter Substanzen Überwachung chemischer Reaktionen Analyse von Produkten aus Destillationsprozessen COMPOUND TYPETYPICAL COMPOUNDSRANGE OF ACCEPTABLE BOILING POINTS Alcohols C1 – C6 50 – 175°C Aldehydes C1 – C8 50 – 175°C Amides C3 – C4 150 – 250°C Carboxylic acids C1 – C4 100 – 150°C Esters C2 – C10 30 – 200°C Ethers C2 – C8 30 – 110°C Heterocycles C5 – C8 100 – 150°C Halogenated hydrocarbons C1 – C8 30 – 120°C Ketones C3 – C8 50 – 175°C Nitriles C2 – C5 50 – 120°C Nitroalkane/aromatic C1 – C6 100 – 210°C Phosphonates C3 – C9 180 – 210°C Sulfides C4 – C8 90 – 150°C Alkanes C4 – C12 30 – 220°C Aromatics C6 – C11 80 – 220°C Technische Spezifikationen Säule: Restek MXT-502.2 – Siltek-beschichteter Edelstahl mit proprietärer Diphenyl/Dimethyl-Polysiloxan-Phase Säulentemperatur: 30 °C bis 160 °C, maximale Heizrate 10 °C/min Detektor: Seacoast Science Kohlenstoff-Nanoröhren-Chemiresistenzdetektor, kompatibel mit Umgebungsluft als Trägergas, sensitiv für polare und unpolare Substanzen Abmessungen / Gewicht: 108 mm (H) × 191 mm (L) × 133 mm (B); 1,3 kg Stromversorgung: 24 V DC, 2,5 A (externes Netzteil) Netzanschluss: 100–240 V AC, 1,5 A, 50–60 Hz Trägergas: Umgebungsluft Umgebungsbedingungen: Temperatur: 5 °C bis 40 °C Luftfeuchtigkeit: ≤ 95 %, nicht kondensierend Flüssiges Injektionsvolumen: 0,01 bis 0,6 µL Betriebsdruck (über Umgebungsdruck): 1 bis 21 kPa Lieferumfang Go Direct® Mini GC™ Mini-USB-Kabel AC-Netzteil Hamilton-Glasspritze (1,0 µL) Zwei Ersatz-Septa (ein weiteres Septum ist bereits installiert) Chromatography Experiments with the Go Direct Mini GC™ – elektronisches Laborbuch mit fünf Experimenten (kostenloser Download über das Vernier-Konto) Transportkoffer

CHF 8’106.25* CHF 9’885.70* (18% risparmio)
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