Service
(function () {
function textOf(el) {
return (el && el.textContent || "").replace(/\s+/g, " ").trim();
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function resolveItemUrl() {
var match = window.location.search.match(/[?&]item=(\d+)/);
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return window.location.origin + "/a-" + match[1] + "/";
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var url = resolveItemUrl();
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return Promise.resolve(null);
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return new Promise(function (resolve, reject) {
var xhr = new XMLHttpRequest();
xhr.open("GET", url, true);
xhr.onload = function () {
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reject(new Error("item page " + xhr.status));
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var doc = new DOMParser().parseFromString(xhr.responseText, "text/html");
resolve(doc.querySelector(".phywe-item-accordion"));
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name: textOf(nameLink || cols[0]),
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function fillTable(tableId, items, withQuantity) {
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tr.appendChild(numberTd);
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var qtyTd = document.createElement("td");
qtyTd.textContent = items[i].quantity || "";
tr.appendChild(qtyTd);
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tbody.appendChild(tr);
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while (wrapper && wrapper.className.indexOf("printtablediv") === -1) {
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var items = [];
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var cols = rows[i].children;
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continue;
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var nameLink = cols[0].querySelector("a");
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name: textOf(nameLink || cols[0]),
mappedTo: textOf(fileLink || cols[1]),
quantity: cols[2] ? textOf(cols[2]) : ""
};
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items.push(item);
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return items;
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function fillFromAccordion(accordion) {
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var versuche = parseItemBlocks(versucheStep, false);
setHeadline("print-versuche", stepTitle(versucheStep));
fillTable("print-versuche", versuche, false);
var lieferumfangStep = accordion.querySelector('[data-step="lieferumfang"]');
var lieferumfang = parseItemBlocks(lieferumfangStep, true);
fillTable("print-lieferumfang", lieferumfang, true);
var zubehoer = accordion.querySelector('[data-step="zubehoer"]');
var sections = zubehoer ? zubehoer.querySelectorAll(".card-body") : [];
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notwendig = items;
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empfohlen = items;
}
}
fillTable("print-zubehoer-notwendig", notwendig, false);
fillTable("print-zubehoer-empfohlen", empfohlen, false);
var mediaStep = accordion.querySelector('[data-step="media"]');
var media = parseMedia(mediaStep);
setHeadline("print-media", stepTitle(mediaStep));
fillTable("print-media", media, true);
}
function start() {
var itemUrl = resolveItemUrl();
if (!itemUrl) {
setTimeout(function () {
window.print();
}, 2000);
return;
}
loadAccordion()
.then(function (accordion) {
fillFromAccordion(accordion);
})
.catch(function (err) {
if (window.console && console.warn) {
console.warn("Accordion konnte nicht geladen werden:", resolveItemUrl(), err);
}
})
.then(function () {
setTimeout(function () {
window.print();
}, 500);
});
}
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", start);
} else {
start();
}
})();
Technical data Anion analysis with precipitation reactionsArticle no: P7511300 
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Principle Precipitants are substances or a mixture of substances, which induce the precipitation of dissolved substances to insoluble solids, the precipitate. Precipitation experiments are often used everyday laboratory practice to identify minor ion concentrations. The aim of this experiment is to introduce the students to precipitation reactions, so students have to conduct precipitation reactions to determine various anions.
Learning objectives
Benefits
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PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10 – 37079 Göttingen – Germany
www.phywe.com
Robert-Bosch-Breite 10 – 37079 Göttingen – Germany
www.phywe.com
