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<p>upon heating in water, with urea releasing CO<sub>2</sub>, while sulfamic acid releases <a href="page.php?w=sulfuric_acid">sulfuric acid</a>.</p>

<p><big>Acid-base reactions</big></p>
<p>Sulfamic acid is a moderately strong acid, K<sub>a</sub>&nbsp;= 0.101 (pK<sub>a</sub>&nbsp;= 0.995). Because the solid is not <a href="page.php?w=hygroscopic">hygroscopic</a>, it is used as a standard in <a href="page.php?w=acidimetry">acidimetry</a> (quantitative assays of acid content).</p>

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: H<sub>3</sub>NSO<sub>3</sub> + NaOH -> NaH<sub>2</sub>NSO<sub>3</sub> +</p><p>
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